Kimai is software that tracks work time and classifies it. It tracks time and prints out a summary (time sheet) of your activities on demand. The reports can be yearly, monthly, daily, by customer, by project, or by action. Its interface is based on using a Web browser. You can install it as a Web service or as a single-user program on your local workstation. It is appropriate both for multiple simultaneous users or a single user. Kimai does not have to run to do the recording.
Auto Project Planner automatically calculates a proper project plan based on your effort estimations and the due dates you have in mind. A list of tasks and a list of employees can be defined. Tasks can be assigned to one or more employees. It is also possible to define a maximum percentage value an employee can/should work on a task. Public holidays, leaves, weekly working hours, and more parameters can be specified and are considered in the calculation. According to this input, the software computes time plans by minimizing the MSE (mean squared error) between expected and computed end dates.
eHour is a Web-based 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. eHour is available as a standalone version or a WAR file, which you can deploy in your existing environment. eHour is JVM (Java & Scala) based.
Schoorbs is a system to make room and resource bookings through a Web 2.0 GUI. You can also interact with it through a REST API. It allows you to book rooms and resources grouped by areas. Activity can be logged via a simple logging interface. The code is automatically tested by several unit tests. The interface can easily be styled through the usage of a template system. Schoorbs produces valid XHTML 1.1 output, has packages for Debian and Ubuntu, and is well documented online.