* [iron/iron](https://github.com/iron/iron) — inspired by [Express](http://expressjs.com/), which is inspired by [Sinatra](http://www.sinatrarb.com/).
* [nickel-org/nickel.rs](https://github.com/nickel-org/nickel.rs) — inspired by [Express](http://expressjs.com/), which is inspired by [Sinatra](http://www.sinatrarb.com/).