We’ve been relatively quiet about this, but we’ve been working on a simple to use JavaScript library that will allow developers to easily integrate with BitGrin and build wallets, exchanges, games, or anything they can imagine.
We just hit a milestone with this project and now have nodes working with a single process. In the short term we’ll refactor Kingfish to use this library which will dramatically improve performance, stability, and crush dozens of existing bugs all in one go.
 In the longer term we expect this to become the go-to library for third party developers to build out an ecosystem of high end BitGrin applications, similar to how web3 enables this for Ethereum dApps.

Both the Kingfish update and the BitGrin library is expected to be completed in the next week or two. We’ll make the library available on npm for all to use freely.