Web Application Server Stack for Delphi/FreePascal/Lazarus
CAM XML Editor for XML+JSON+Hibernate+SQL Open-XDX sponsored by Oracle
Extract files from unusual archive formats
professional open source software for LCA
Open Source Podcast Publishing Solution
Open-DIS implements the IEEE DIS protocol in multiple languages.
Lets you store and query data within the wiki's pages.
Web-based RSS Reader
Open source Extract Transform Load engine written in Java
Store links like Evernote from Android with WebDAV