The cloud is awesome; it’s convenient, flexible and extremely scalable. There aren’t a lot of arguments that go against using a cloud based app, except for concerns regarding security and cost. However hard one tries to argue against these Notions, we will have to agree that to a significant extent these two concerns are true. It’s Not always a comfortable decision to let someone else hold on to your business data.
The second concern regarding overall cost is true (at least as of today). Over a couple of years, the subscription charges of SaaS apps can add up to a whole lot in comparison to standard enterprise apps. The best work around is to adopt the private cloud (ie. self-host apps in your own servers, behind your own corporate firewall). We’ve compiled a list of 40 apps to help you do just that.
Mail Servers

Sendmail
Sendmail
Sendmail provides message processing applications and services that enable sending and receiving messages is a wide variety of formats including the popular SMTP format. Sendmail has been around for a while and has a commercial version of the product available for enterprises.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

IceWarp
IceWarp
IceWarp excels in all areas of essential business communication through a single, highly integrated, secure and standards-compliant platform. It performs a multitude of tasks enabling users to create, manage and share all personal data, including Contacts, Calendars, Files, Tasks etc. They can also easily schedule meetings and company resources.
Open Source: No
Pricing: Upon Request
Free Trial: Yes
Platform: Cross Platform

Eudora
Eudora
Eudora Internet Mail Server is one of the popular Internet mail servers for Macintosh. If you need to handle email for a dozen users, or thousands of users, EIMS is a reliable and easy to use solution. It supports even older machines with a PowerPC architecture and Mac OS 8.
Open Source: Yes
Pricing: $200
Free Trial: 60 days
Platform: Mac

Open Exchange
Open Xchange
Open Exchange is a powerful and feature rich mail server. It comes in both community and commercial editions. Open-Xchange enables users to easily aggregate e-mail and contact information from Social Networks and other e-mail accounts in a central application – providing users with all relevant data – personal and business – anywhere, anytime and with virtually any device.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

MailEnable
MailEnable
MailEnable’s mail server software provides a powerful, scalable hosted messaging platform for Microsoft Windows. The self hosted app offers stability, flexibility and an extensive feature set which allows you to provide cost-effective mail services. The new version of MailEnable comes with a webmail client has been optimized for improved speed and responsiveness.
Open Source: No, but a free version is available.
Pricing: From $349
Free Trial: Available
Platform: Windows
Webmail Clients

Roundcube
Roundcube
Roundcube is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Zimbra
Zimbra
Now owned by VMware, Zimbra calls itself the next generation of Microsoft Exchange server. In addition to email and calendar, it provides document storage and editing, instant messaging, and simplified administrative controls all in an award winning webmail user interface built with the latest AJAX web tech Nology.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Linux

SquirrelMail
SquirrelMail
SquirrelMail is the grand old man of the webmail ecosystem. It is a standards based webmail package that has very few requirements and is very easy to configure and install. SquirrelMail has all the functionality you would want from an email client, including strong MIME support, address books, and folder manipulation.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Mailr
Mailr
Mailr is an open source webmail application written in Ruby which uses Ruby On Rails web application framework. The developers have a disclaimer that the app is tested with Courier-IMAP but it should be possible to use it with any other IMAP server. Do remember that your server should support Ruby for installing this app.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

AfterLogic
AfterLogic
WebMail Lite is a free community edition of full-featured AferLogic WebMail Pro server application intended for users who need a clean and simple web mail application, which is fast and easy to use. Interestingly, this web app has separate packages compatible for both ASP.Net and PHP environments.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform
Collaboration

Mindquarry
Mindquarry
Mindquarry is a collaborative software platform for file sharing (documents, images, media files, etc.), task and project management, team collaboration and Wiki editing that meshes simplicity and functionality. As a result, k Nowledge workers are able to connect with team members and share information from wherever they are, effectively improving team-work and increasing productivity within the company.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Liferay
Liferay
Liferay Social Office is a social collaboration solution for the enterprise. This full virtual workspace streamlines communication, saves time, builds group cohesion and raises productivity. All you have to do is log in and work the way you want to, at your convenience. A commerical edition is available as well.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Feng Office
Feng Office
Previously known as Opengoo, Feng Office lets you manage your projects and business services, Collaborate with your team and your customers. With this web app, you can organize and share documents and files behind your corporate firewall too. A commercial SaaS version of the app is available for immediate deployment.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

EtherPad
EtherPad
EtherPad has been made open source after being acquired by Google. It’s a web-based word processor that allows people to work together in real time. When multiple people edit the same document simultaneously, any changes are instantly reflected on everyone’s screen. The result is a new and productive way to collaborate on text documents, useful for meeting Notes, drafting sessions, education, team programming, and more.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform and needs Scala installed.

WebCalender
WebCalender
WebCalendar is a PHP based calendar application that can be configured as a single-user calendar, a multi-user calendar for groups of users, or as an event calendar viewable by visitors. This web app has support for almost every form of database used in the enterprise environment including MySQL, PostgreSQL, Oracle, DB2, Interbase, MS SQL Server, or ODBC.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform
Time Tracking & Invoicing

ClockingIT
ClockingIT
ClockingIT is a hosted application for tracking all your tasks, issues, projects and time spent, with a focus on software development and handling large amounts of tasks. this Ruby on Rails app helps you manage time for multiple clients and multiple projects at the same time.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Kimai
Kimai
Kimai lets you track work time and prints out a summary of your activities on demand. Tracking time on a multitude of ways – Yearly, monthly, daily, by customer, by project, by action – is possible with this web app. It is available in English and major European languages.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Bamboo Invoice
Bamboo Invoice
Bamboo Invoice is a free Open Source invoicing software intended for small businesses and independent contractors. It is known for the easy to use interface, clean code and extensive multi lingual support.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

SimpleInvoices
SimpleInvoices
Simple Invoices focuses on the basic needs of invoicing yet gives users advanced flexibility without compromising simplicity. The web app is Not limited to just invoices. You can create receipts, estimates, quotes, and other document types you can think of.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

MyClientBase
MyClientBase
MyClientBase is designed to manage your clients and invoices as simply as possible without sacrificing powerful features that make a great application. It is well known for its highly customizable options and features that provide a comprehensive invoicing solution. MyClientBase offers support for multiple tax rates per invoice and can apply tax across an entire invoice or against individual invoice items.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform
Project Management

Project.net
Project.net
Project.net empowers team members and teams through a comprehensive project workspace where they log and manage their individual contributions while simultaneously seeing the “big picture” of the overall project.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

project-open
project-open
project-open is an ambitious application that can handle anything from project management to CRM and ERP. Use it to generate Gantt charts that helps you communicating your project. Besides native charts there’s also an export/import interface to the Open Source product “GanttProject”. Its drag-and-drop functionality allows you to conveniently reorganize tasks and import them back.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Project HQ
Project HQ
Project HQ is a collaborative open source project management tool, similar to Basecamp. Project HQ uses a structured workflow to assist you in managing your projects.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform and is built on Python.

Project Pier
Project Pier
Project Pier is focused on simple concepts and usability to provide an easy to use project management solution. It organizes your projects into Milestones, Messages, Task lists, Tasks and Files. E-mail Notifications for new milestones, tasks, messages and comments mean that your users can stay in the loop without checking the site.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Redmine
Redmine
Redmine is a flexible project management web application. Written using Ruby on Rails framework, it has support for Multiple projects and Flexible role based access control. Other Notable features include LDAP access and user self-registration support.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform
Issue Tracking

OTRS
OTRS
OTRS is an open source software system for managing a wide range of business processes, from Help Desk to Support Center to IT Service Management. Based on a set of functions built on a “trouble ticket,” OTRS is built to allow support, sales, pre-sales, billing, internal IT, support desk and many other departments to react quickly and responsibly to inbound inquires. There is a SaaS version as well.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform
Request Tracker
Request Tracker
Request Tracker is an gorgeous issue tracking system which thousands of organizations use for bug tracking, help desk ticketing, customer service, workflow processes,change management, network operations, youth counselling and even more.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform and is written in PERL.

Bugzilla
Bugzilla
Bugzilla is a well known bug or issue tracking tool that can help you get a handle on the software development process. Successful projects often are the result of successful organization and communication. Bugzilla is a powerful tool that will help your team get organized and communicate effectively.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Eventum
Eventum
Eventum is developed and maintained by the MySQL team. Eventum is a user-friendly and flexible issue tracking system that can be used by a support department to track incoming technical support requests, or by a software development team to quickly organize tasks and bugs.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

BugNET
BugNET
As you can infer from the name, BugNET is an issue tracking and project issue management solution built using the ASP.NET web application framework. Email Notifications, reporting and per project configuration of fields and values allows efficient management of bugs, feature requests, and other issues for projects of any scale.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform:Windows
CRM

SugarCRM
SugarCRM
SugarCRM is one of the world’s most used CRM system.SugarCRM helps companies communicate with prospects, share sales information, close deals and keep customers happy. Use their SugarExchange marketplace to find extensions to get the max out SugarCRM.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

openCRX
openCRX
openCRX is an open CRM solution that meets the needs of organizations requiring multifunctional, enterprise-wide coordination of sales generation, sales fulfillment, marketing and service activities to customers, partners, suppliers or intermediaries. openCRX’s account management provides a true 360° view of customers across contracts, activities, products, and status. Account management enables your employees to build tighter, more profitable relationships by understanding the status of each account.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform, but requires JDK installed.

Concursive
Concursive
ConcourseSuite is Concursive’s dedicated Customer Relationship Management application. It is a complete front office solution that integrates CRM, website creation, content management and team collaboration capabilities into one easy to use, easy to deploy solution. that is available in both hosted and on-premise configurations. ConcourseSuite comprises several fully integrated modules.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

Tustena
Tustena
Tustena CRM is an in Novative and cost-effective hosted customer relationship management solution that helps you optimize your time, improve customer satisfaction and increase sales. It delivers solid business value to companies of all sizes, from small and medium-sized businesses to large enterprises.
Open Source: No
Pricing: Available upon request
Free Trial: 30 days
Platform: Cross Platform

XRMS
XRMS
XRMS is an advanced solution that goes beyond the functions of the conventional CRM. In addition to Sales Force Automation, XRMS also includes computer telephony integration, business intelligence tools and an advanced plugin architecture for further extending its features.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform and supports a lot of Database types.
ERP

OpenERP
OpenERP
OpenERP is a comprehensive suite of business applications including Sales, CRM, Project management, Warehouse management, Manufacturing, Financial management, Human Resources just to name a few. OpenERP unique modular approach allows customers to start with one application and to add other modules later on.
Open Source: No
Pricing: Starts from $1800
Free Trial: Yes
Platform: Cross Platform

Compiere
Compiere
Compiere’s revolutionary design enables applications to be easily customized and extended without programming – a first in the ERP industry. Integration with other applications is easy using Compiere’s service oriented architecture (SOA) and web services. SaaS and commercial versions are available as well.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

ERPNext
ERPNext
ERPNext is one among today’s newest crop of ERP solutions. They cover entire business processes with a lot of modules. The prominent modules are Accounting, Sales, Production, Human Resources, Inventory and Project modules.
Open Source: No
Pricing: Available upon request
Free Trial: 30 days.
Platform: Cross Platform

Openbravo
Openbravo
With the latest verison, Openbravo 3 claims to be the agile ERP. Openbravo 3 has a gamut of attractive features including the ability to manage multiple levels of information on the same screen, with ergo Nomic splitters and ability to independently toggle each level between grid and form view.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform

xTuple
xTuple
xTuple is an open source ERP solution for small and medium businesses. There is a commercial version of it available as well.
Open Source: Yes
Pricing: NA
Free Trial: NA
Platform: Cross Platform, requires PostgreSQL database.
Share Your Thoughts!
What do you think of this list? Are there some great apps we have missed?


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