SPIT is described as 'Simple PHP Issue Tracker' and is a Issue Tracking System in the Development category. There are more than 25 alternatives to SPIT, not only websites but also apps for a variety of platforms, including SaaS, Mac, Windows and Linux. The best alternative is JIRA. It's not free, so if you're looking for a free alternative, you could try GoodDay or A1 Project Manager. Other great sites and apps similar to SPIT are Jira Clone (Free, Open Source), Codegiant (Freemium), Bugzilla (Free, Open Source) and Assign It To Me (Paid).
GoodDay is a project, product and work management platform that gives teams the best tools for planning, day-to-day work, and continuous improvement of all processes based on transparency, accountability, agility, and recognition.
A1 Project Manager is a free task and project management software that automatically keeps your team organized and monitors progress of all of your projects. Let A1 Project Manager organize what you do, so you can focus on why you do it.
Codegiant includes pretty yet powerful tools for agile project management. It is meant to be a single platform for project management. People are loving it as a great alternative to Jira as it is faster with better UI/UX and is free to use for upto 5 users.
Bugzilla is a robust, featureful and mature defect-tracking system, or bug-tracking system. Defect-tracking systems allow teams of developers to keep track of outstanding bugs, problems, issues, enhancement and other change requests in their products effectively.
FogBugz manages projects, tracks bugs, and even tells you when you’re going to ship. It includes an issue tracker, advanced project management and scheduling, a wiki, and customer support features like email routing and discussion groups.