NULS recently released their ChainBox which is their chain-building solution for developers of all kind, not just blockchain native. Developers can choose between two objectives:
1. Build module that can realize specific application scenario
2. Design and implement a blockchain ecosystem extension module
The prize is pretty massive $500,000 in Nuls prizes.
Pretty cool for any developer to give their hand at it:
https://nuls.io/hackathon/