The Glulx Runtime Instrumentation Project (GRIP) provides debugging tools for authors of interactive fiction (IF) by building on the capabilities of the Glulx virtual machine.
GRIP has migrated to https://github.com/i7/i7grip. This site will no longer be updated.
- An Inform 7 debugger
- Inform 7 call stacks for problem messages
- Floyd mode, for testing compatibility with command-line or MUD interpreters