Punchout! is a simple and straightforward time clock system that allows an administrator to set up multiple clients each with their own pay rate. The user can then punch the Punch In! or Punch Out! button to track their hours and pay.
PHP Timeclock is a simple yet effective web-based time clock system. It allows you to track all employee time as well as upcoming vacations and more, it can also replace manual sign-in sheets and such. It is written in php and utilizes a mysql database.