• A system for giving tests on paper, but marking and returning them online.
• Designed for giving consistent, meaningful feedback to students.
• Free/Open Source Software written in Python using Qt and other components.

• Respects privacy of student data -- all data stays on your server, and markers do not see student name or ID when working.
• Easy multi-versioned tests -- designed to handle crowded classrooms and multi-section courses over multiple days.
• Simplify logistics and minimizes paper-handling.
• Free -- Plom is both Libre and Gratis. No software to buy, and no subscriptions to pay.

Take a look at the plomgrading.org.