CaseManager is an application to manage projects. Main-part is a document-manager but CaseManager also features time registration, address management and billing.
It is tailored to lawyers needs but should be helpful for other professions as well.
Opentimesheet is a web weekly timesheet interface. It can be used with any time registration system. Opentimesheet is an html file, "index.html", based on the Dojo toolkit.
VMOSS (Volunteer Management Open Source Software) is a standalone volunteer management system, providing volunteer and project registration, monitoring, and reporting functionality. It was originally developed as part of the Sahana (LAMP) System.
Webbased time registration tool for project based businesses. The primary objective is to keep time tracking as simple as needed while still being very effective at measuring and reporting the amount of time your team spends on a project.