Projects
Accounting
Backup
Amanda, Bacula, rsnapshot, rsync
Bug tracking, Helpdesk and Trouble Ticket Systems
Content Management Systems
django-CMS, Drupal, MODx, Plone, Wordpress
Cryptography
Customer Relationship Management
Databases
MySQL, PostGIS, PostgreSQL, Slony, SQLite
Desktop Environment
Desktop Publishing
Development Tools
Bazaar, CVS, GCC, GDB, Git, GNU Enscript, Mercurial, OpenJDK, Subversion, ViewVC
Digital Video Recorder
DNS Server
Document Management Systems
Courier MTA, Cyrus, Dovecot, Evolution, Exim, Mozilla Thunderbird, Postfix, qmail, Sendmail
Enterprise Resource Planning Systems
File server
Firewall
Dansguardian, Ferm, iptables, Shorewall
Groupware
Citadel, eGroupWare, Kolab, Open-Xchange, Scalix, Zarafa, Zimbra
GUI toolkit
High Availability/Clustering
Integrated Development Environment
Intranet portal
Linux Distribution
CentOS, Debian GNU/Linux, Fedora, Gentoo, Kubuntu, Mandriva Linux, Red Hat Linux, Slackware, SUSE Linux, Ubuntu Linux, Xandros
Mailing List
Microsoft Windows interoperability
Monitoring
Network
Cfengine, Openfiler, Open-iSCSI, OpenLDAP, OpenVPN, Puppet
Office Suite
KOffice, LibreOffice, OpenOffice.org
Operating Systems
Android, FreeBSD, Linux, NetBSD, OpenBSD
Printing
Programming Language
C, C++, Java, Mono, Perl, PHP, Python, Ruby
Project Management
Spam and Antivirus
amavisd, ClamAV, Open Security Filter, Postgrey, SpamAssassin
Virtualisation
Eucalyptus, KVM, VirtualBox, Xen
VOIP Telephony
Asterisk, Callweaver, Ekiga, FreePBX, Gemeinschaft, OpenSIPS/OpenSER
Web browsing
Web Development
Catalyst Web Framework, Django, Horde, Ruby on Rails, Zope
Web services
Apache, lighttpd, Squid, Tomcat
