Prefer - Professionals you need, from people you know

Traq - Traq is a PHP powered project manager and issue tracker featuring multiple projects, milestones...

Introwise - All-in-one scheduling and business management platform for coaches, tutors and consultants to run their business online.

Bugify - Bugify is a simple PHP issue tracker, designed to offer powerful bug tracking capabilities in an easy to use system.

Warmspace - Tech-powered conversations that transform relationships in work and life.

jtrac - JTrac is an open source and highly customizable issue-tracking web-application written in Java.