60 Open Source Replacements for Communications Software: Page 2

16. WebGUI Replaces: Sitecore CMS, Kentico

This CMS offers a framework for creating your own Web apps, as well as a full suite of modules, including wikis, photo galleries, message boards, event management, ecommerce, surveys, donations and more. Operating System: Windows, Linux/Unix, OS X

17. XOOPS Replaces: Sitecore CMS, Kentico

Short for "eXtensible Object Oriented Portal System," XOOPS has grown far beyond its origins as portal software to support a wide range of sites, from small one-person blogs to large, multi-purpose enterprise websites. It features a modular design and is driven by a MySQL database. Operating System: OS Independent

Customer Relationship Management (CRM)

18. SugarCRM Replaces: SalesForce.com

"One of the world's most used CRM systems," Sugar helps you communicate with your customers and manage sales and customer service interactions. If you don't want to host the free version on your own server, you can also purchase on an SaaS basis. Operating System: Windows, Linux, OS X.

19. vtiger CRM Replaces: SalesForce.com

Used by more than 100,000 companies, vtiger offers lead management, support automation, campaign management, inventory management, e-mail integration, and mobile support for a very low total cost of ownership. Download and host it yourself, or use the SaaS version for just $12 per user per month. Operating System: Windows, Linux

20. Orange Leap Replaces: Blackbaud, Convio

Orange Leap helps non-profit organizations management their communication with donors, supporters and other constituents. Paid support is also available. Operating System: Windows

21. CiviCRM Replaces: Blackbaud, Convio

Similar to Orange Leap, CiviCRM was particularly designed for advocacy groups, NGOs and non-profit organizations with similar needs. It includes modules for case management, fundraising, event management, membership management, e-mail communications and marketing, and it integrates with both Drupal and Joomla. Operating System: OS Independent

Desktop Publishing

22. Scribus Replaces: InDesign, QuarkXPress, Microsoft Office Publisher

Suitable for professional designers, Scribus desktop publishing offers features like color separations, ICC spot color support and PDF creation. Despite the advanced features, there is plenty of help available, so it's also suitable for amateurs. Operating System: Windows, Linux, Unix, OS X

Email/Collaboration/Groupware

23. Collabtive Replaces: Basecamp, ActiveCollab

Designed as a replacement for Basecamp, Collabtive can even import Basecamp files. You can host it on your own server or use the hosted service. Operating System: OS Independent

24. cyn.in Replaces: Sharepoint, Novell Groupwise

Available as a free app, a hosted SaaS product or a paid enterprise on-premise appliance, cyn.in promises to "help teams to communicate faster and build collaborative knowledge." It offers wikis, social networks, blogs, file sharing repositories, micro blogs, discussion boards, and other tools in a unified framework. Operating System: Windows, Linux, OS X

25. Group-Office Replaces: Microsoft Office Outlook, Basecamp

Group-Office features a calendar, file sharing, e-mail, basic CRM capabilities, project management and mobile synchronization capabilities. You can choose to run the free or paid versions on your own mail server, or you can purchase Web-based service on a subscription basis. Operating System: OS Independent

26. phpGroupWare Replaces: Microsoft Office Outlook, Sharepoint

This Gnu project offers more than 50 separate apps that enterprises can mix and match to meet their own communications needs. Capabilities include contact management, e-mail, calendar, Web content management, document management, project management, bug tracking, and more. Operating System: Windows, Linux

27. Simple Groupware Replaces: Microsoft Office Outlook, Novell Groupwise

This Outlook-compatible enterprise groupware features email, calendaring, contacts, tasks, document management, project management, cell phone integration, full-text search and a library of extensions. It also uses the sgsML programming language so that in-house developers can build their own Web apps to extend its capabilities. Operating System: Windows, Linux

28. Evolution Replaces: Microsoft Office Outlook

Often called "the Outlook of Linux," Evolution offers e-mail, calendar and other capabilities from an interface that looks a lot like the Microsoft product. Other notable features include built-in spam filtering, advanced search capabilities, encryption support, and iCalendar support. Operating System: Linux

29. Thunderbird with Lightning Replaces: Microsoft Office Outlook

Made by Mozilla, the organization behind Firefox, Thunderbird is a tabbed, searchable e-mail client with an emphasis on customization capabilities. If you want an integrated calendar, you'll also need to download the Lightning add-on. Operating System: Windows, Linux, OS X

30. EGroupware Replaces Microsoft SharePoint, Documentum

Calling itself "the leading Online Collaboration Tool," EGroupware includes CRM, project management, event management, document management, file server, incident tracking, and more, as well as traditional groupware functionality. Hosted and commercially supported versions are available, or you can download the community version for free. Operating System: OS Independent.

31. Feng Office Replaces: Basecamp, ActiveCollab

Now with more than 350,000 users, Feng Office provides Web-based groupware, plus project management, billing, and other features useful to services companies. You can download the free community version or use one of the professional versions on an SaaS basis. Operating System: Windows, Linux, OS X.