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.
iDempiere - iDempiere Business Suite ERP/CRM/SCM done the community way.
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.
DataNote ERP - DataNote ERP is a complete ERP solution built for multiple industries such as construction, engineering, food and beverages, metal processing, and healthcare, among others.
Cattr - Cattr is a free open-source self-hosted time tracker with desktop clients for windows, mac, linux.
PracticePanther - PracticePanther offers CRM, invoicing, time tracking and communication solutions for law firms.