netPark - netPark is a cloud hosted point of sale and revenue control system for valet or self park operations.

Kapow - Kapow is a punch clock program designed to easily keep track of your hours, whether you're...

AirGarage - Parking management tool for businesses, hotels & churches

Kimai - Kimai is a free open source timetracker.

O-Valet - Valet Parking Software for Hotels, Airports, Casinos, Hospitals, and Restaurants. Interfaces with all Hotel PMS Systems, Parking Equipment and Management Software, and Loyalty Programs

Personal Task Manager - PTM is an Open Source time tracking tool hosted by Sourceforge.net.