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.
PlanSwift - PlanSwift allows contractors to create accurate project estimates specific to their individual trade.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
HCSS HeavyBid - Estimating software for the construction industry
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Methvin - Project management and estimating tool designed for the construction industry.