Social Source Commons

Zimbra is an open source server and client technology for next-generation enterprise messaging and collaboration.

Linux distribution with a very strong community

open source operating system optimized for use as a server

Web application server software.

A thin-client application server running on Windows and Unix.

Free FTP server software.

Commercial Unix server software.

Mail server and collaboration platform for multiple operating systems.

Integrated server suite for small organizations, bundling Windows Server and Exchange Server.

Multipurpose server software.

Messaging and collaboration server software.

Anti-virus software for desktops and file servers.

Free email server software with web-based interface for users and administrators.

Antivirus protection for desktops and servers.

ASPCache™ is a high performance, thread-safe collection component designed to make it easy to cache data and page fragments in Active Server Pages. Prudent use of caching makes Web pages faster and reduces Web server load.

ChatSpace Community Server contains a complete array of real-time community and support applications including chat, message boards, instant messaging, live events, and queued help

Easy to install & maintain Linux distro targetting small offices with no professional IT staff

K12 Linux Terminal Server.

MP3 streaming server

Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server. It is designed to provide DNS and, optionally, DHCP, to a small network. It can serve the names of local machines which are not in the global DNS. The DHCP server integrates with the DNS server and allows machines with DHCP-allocated addresses to appear in the DNS with names configured either in each host or in a central configuration file. Dnsmasq supports static and dynamic DHCP leases and BOOTP/TFTP for network booting of diskless machines.

Open Workbench is a FOSS project management application. Open Workbench provides robust project scheduling and management functionality. Although it is provided as free software you still need the Clarity suite if you want to use a central database to manage enterprise collaboration. With Clarity's Schedule Connect module, it can specifically link to many PCs with Open Workbench 1.1 installed. The module installs on both centralised server and the desktops, adding database access to Open Workbench’s screens.

Splunk is an application that specializes in indexing and searching on time-based data from heterogeneous sources. It has decent ad-hoc reporting tools to generate various reports and charts. Base version is free; gradual pricing for "enterprise" features.

MPower Open is an enterprise-class client/server CRM that compares very well feature-wise with Blackbaud's Raiser's Edge.

"A hosted virtualization platform that installs like an application on any existing server hardware and partitions a physical server into multiple virtual machines."

The FreeSWITCH project is building an open source softswitch, which will be optimized for high definition voice.

Exchange Server Email Archiving and Retreival with Outlook integration

Webmin is a web-based interface for system administration for Unix. Using any modern web browser, you can setup user accounts, Apache, DNS, file sharing and much more. Webmin removes the need to manually edit Unix configuration files like /etc/passwd, and lets you manage a system from the console or remotely.

open source print server

Activity monitoring and graphing tool.

Egnyte Cloud File Server provides businesses with Online Storage, FTP Site, FTP Server, File Sharing, Cloud Storage.