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.
Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
Clockify - Simple and free time tracker. Perfect for small and mid-sized businesses as well as freelancers. Unlimited projects and users, unlimited productivity. Get all the premium functionalities, completely free.
WIP.co - Work in progress. We are a community of makers who help each other ship product.
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
Trackabi - A robust and flexible online tool for time tracking and leave management for freelancers, consultants, small and medium-sized companies.