The Apache Open For Business Project is an enterprise automation software project that includes ERP, CRM, E-Business/E-Commerce, SCM, MRP, and CMMS/EAM functions. It is a foundation and starting point for enterprise solutions and can certainly be used out of the box, but is also great for creating specialized applications.
Drivel is a GNOME client for working with online journals, also known as weblogs or simply blogs. It retains a simple and elegant design while providing many powerful features, including support for LiveJournal, Blogger, MovableType, Advogato, and Atom journals. (Systems based off these are also supported, including WordPress and Drupal.)
Open Administration for Schools (OAfS) is a Web-based school administration package. Open Admin does demographics, attendance, discipline, report cards, and has an online gradebook and parent viewing function. It is designed for elementary, K-12, and high schools. It generates plain HTML and uses LaTeX for PDF generation. It also includes special education and division-wide central office modules (all schools run on the same server with different virtual sites; two sites per school, one for teachers, and one for the office). Parent functions are by separate parent/school site.
MuseScore lets you notate and compose music easily with your keyboard, your mouse, or a MIDI keyboard. You can print beautifully engraved sheet music or export it as PDF or PNG. You can play your score, transpose it, and save it as audio or MIDI file. MuseScore also supports MusicXML to let you share your composition with other scorewriters. MuseScore is often advertised as a cost effective alternative for Sibelius and Finale.
Dabo is a three-tier, cross-platform database application development framework, written in Python with the wxPython GUI toolkit. The controls in Dabo's UI are easily bound to data by setting two properties. The business object is designed to afford you complete control over the validation and handling of your data. The cursor classes are abstracted from their backend implementations, allowing for easy support of nearly any backend database. Dabo's design and approach has been inspired by RAD database development tools such as Visual FoxPro, Delphi, and Visual Basic.
aria2 is a utility for downloading files. The supported protocols are HTTP(S), FTP, BitTorrent, and Metalink. It has a powerful segmented downloading ability, downloading a file from multiple sources and multiple protocols and utilizing your download bandwidth to the maximum. It supports downloading a file from HTTP(S)/FTP and BitTorrent at the same time, while the data downloaded from HTTP(S)/FTP is uploaded to the BitTorrent swarm. Using Metalink's chunk checksums, aria2 automatically validates chunks of data while downloading a file like BitTorrent.
Apache OpenMeetings is a multi-language customizable video-conferencing and collaboration system. It supports audio/video and allows you to see the desktop of any participant. It includes a whiteboard, the ability to import a variety of image formats, invitations, a moderation system, backup and language modules, private and public conference rooms, and the ability to record meetings. The project also provides integrations for Asterisk, Jira, Confluence, Moodle, Sakai, and SugarCRM, and connectors for LDAP and ADS.