Presearch is a search engine and an aggregator that helps you search multiple search engines and sites at once. ...more

mailcow is a mail server suite. ...more

OX Open-Xchange is a web-based communication, collaboration and office productivity software. ...more

Tkabber is a GPL instant messaging client for the XMPP protocol which uses the Tk toolkit for the GUI. ...more

Webmail Lite is an open-source webmail frontend. ...more

iRedMail is a free, OpenSource mail server. ...more

JSter is a catalog of javascript libraries. ...more

PHPBack is an open source feedback system. ...more

Sentora is an open-source web hosting control panel built specifically to work on a variety of Linux distributions. ...more

Turnkey Linux Virtual Appliance Library is a free open source project which has developed a range of Debian based pre-packaged server software. ...more

The Linux Alternative Project lists Linux alternatives of popular Softwares. ...more

Postfix is a mail server that started life at IBM research as an alternative to the widely-used Sendmail program. ...more

Add to Search Bar lets you add the search functionality of any page to the search box with no effort. ...more

GigaBlast is a web search engine. ...more

NethServer is an operating system for Linux enthusiasts, designed for small offices and medium enterprises. ...more

DeeperWeb is a free metasearch engine for information on the World Wide Web that employs tag cloud techniques for navigating through Google search results. Topic Map methods give results relevant to a specific topic. ...more

hMailServer is a free open source email server for Microsoft Windows. ...more

ZPanel is a free and complete web hosting control panel for Windows and POSIX (Linux, UNIX and MacOSX) based servers. ...more

Horde is a free web-based groupware. The components of this groupware rest on the Horde framework. This PHP-based framework provides all the elements required for rapid web application development. ...more

Kopano is an open-source groupware application suite originally based on Zarafa. ...more

SquirrelMail provides both a web-based email client and a proxy server for the IMAP protocol. ...more

RainLoop Webmail is a simple, modern & fast web-based email client. ...more

SoapUI is an open-source web service testing application for service-oriented architectures (SOA) and representational state transfers (REST). Its functionality includes web service inspection, invoking, development, simulation and mocking, functional testing, load and compliance testing. ...more

SOGo (Scalable OpenGroupware.org) is an open source collaborative software (groupware) server with a focus on simplicity and scalability. ...more

Instantbird is a cross-platform instant messaging client based on Mozillas XULRunner and the open source library libpurple used in Pidgin. ...more

Miranda NG is a successor of Miranda IM, a popular multi-protocol instant messaging client for Windows. ...more

Zentyal is an open source email and groupware solution based on Ubuntu Linux. ...more

ERPNext is a free and open-source integrated Enterprise Resource Planning (ERP) software. ...more

MediaPortal is an open-source media center (HTPC) software project. ...more

ClearOS System (ClarkConnect) is a Linux distribution, based on CentOS and Red Hat Enterprise Linux. ...more