- [httprouter](https://github.com/julienschmidt/httprouter) for the basic BSD kernel's [trie algorithm](https://en.wikipedia.org/wiki/Trie) used inside [muxEntry](https://github.com/kataras/iris/blob/master/http.go#L578), edited by [Iris' author](https://github.com/kataras) to improve its performance and achieve 0 memory allocations per operation.
- [goo](https://github.com/kataras/goo) used inside iris command line tool
- [cli](https://github.com/kataras/cli) used inside iris command line tool
- [color for the logger's colors](https://github.com/fatih/color)