RackTables - Racktables is a nifty and robust solution for datacenter and server room asset management.
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Opendcim - a free, web based Data Center Infrastructure Management application.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
DCImanager - DCImanager is a platform for managing physical equipment. Connect any physical equipment to a single platform. Use the platform to manage your servers, switches, PDU as well as physical and virtual networks.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.