GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
Redmine - Flexible project management web application
AppZero - AppZero is a monitoring and migration tool that allows users to keep track of different applications and servers in both simple and complex IT environments.
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems