Howdy,
`yocto`, a minimal JSON parser & printer, is now feature complete, documented and tested:
>From the CHANGELOG:
- Removed `Read` & `Show` instances in favor of `decode` & `encode`.
- Added `QuickCheck`-based test suite.
- Fixed decoding of numbers between -1 and 1.
- Added error check for trailing (unparsed) input.
Anyway, I hope you find it useful; the code lives here:
Alvaro