SOGo is a very fast and scalable modern collaboration suite
Java Job Scheduling and Task Automation
Simple-to-use/-install issue-tracking system: web, REST, email, CLI
Easy to set up bug tracking with Java
MailEclipse Laravel Mail Editor
A modern Docker LAMP stack and MEAN stack for local development
Lightweight thread library for C/C++ coroutine (similar to goroutine)
Project management web application
open source issue tracking system
Modular web site spider for web developers.
.NET object oriented encapsulation and access library to Yahoo! Mail
Webkosa is the open source edition of Webcrossing.