VOGSY - Professional service automation tool built on Google G Suite

Microsoft Office Access - Access is now much more than a way to create desktop databases. It’s an easy-to-use tool for quickly creating browser-based database applications.

Office Timesheets - Professional Services Automation

LiveCode Platform - It is Both Under the GPL and it is also Proprietary if using the GPL version the software you make...

HarmonyPSA - HarmonyPSA - Professional Services Automation (PSA) for IT Businesses

Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.