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
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
"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.
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
Orange Leap helps non-profit organizations management their communication with donors, supporters and other constituents. Paid support is also available. Operating System: Windows
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
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
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
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
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
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
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
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
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
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.
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.
One of the ways around the issues of security and control that make some businesses wary of cloud computing is to build a private cloud -- one that remains within the corporate firewall and is wholly controlled internally. Private clouds also increase the agility of IT an organization's IT infrastructure and make it easier to roll out new technology projects. Download this eBook to get the facts behind the private cloud and learn how your organization can get started.