# Open-source contribution

If you’re interested in contributing additional ideas and suggesting use-cases for Cryptosat, you can play with the Cryptosim source code, which is available on our [Github](http://www.github.com/cryptosat). The main repository is [`cryptosim-tutorial`](https://github.com/cryptosat/cryptosim-tutorial)but, depending on the pieces you want to tweak, you may also want to check out the [`cryptosim`](https://github.com/cryptosat/cryptosim) and [`cryptosim-visualization`](https://github.com/cryptosat/cryptosim-visualization) repositories.