- Money: https://github.com/mckaz/RubyMoney
- BusinessTime: https://github.com/mckaz/bussiness_time_verify
- Unitwise: https://github.com/mckaz/unitwise_verify
- Geokit: https://github.com/mckaz/geokit_verify
- Boxroom: https://github.com/mckaz/boxroom-verify
- Matrix: https://github.com/Bourg/matrix-verify