1)   Lessons Learned Server for Linux 1.0.5
A knowledgebase system allowing to store, access, search and explore knowledge within your organization, department or team.

 2)   Request Tracker 3.1
For help desks or any type of call center. Quickly build a database to manage and track requests made by customers. Easily search the database of past problems and solutions. Output your data to reports, html pages or export to other software.