About Kimai

Kimai is an open-source time tracking solution. It tracks work time and prints out a summary of your activities on demand. Yearly, monthly, daily, by customer, by project … Its simplicity is its strength. Due to Kimai’s browser based interface it runs cross-platform, even on your mobile device.
an existing environment to add support for new protocols, implement sign-up/recovery/etc. in your application so you don't have to deal with it, and many other things.