Create a new `Cryptocurrencies` category in `Applications written in Rust`

README.md

@@ -102,6 +102,9 @@ See also [Friends of Rust](https://www.rust-lang.org/friends.html) (organization
 
 * **Audio**
   * [indiscipline/zrtstr](https://github.com/indiscipline/zrtstr) — a command line utility for checking if stereo wav files are faux-stereo (i.e. have identical channels) and converting such files to mono. [<img src="https://api.travis-ci.org/indiscipline/zrtstr.svg?branch=master">](https://travis-ci.org/indiscipline/zrtstr)
+* **Cryptocurrencies**
+  * [Parity](https://github.com/paritytech/parity) — Fast, light, and robust Ethereum implementation [![build status](https://gitlab.ethcore.io/parity/parity/badges/master/build.svg)](https://gitlab.ethcore.io/parity/parity/commits/master)
+  * [parity-bitcoin](https://github.com/paritytech/parity-bitcoin) — The Parity Bitcoin client [<img src="https://api.travis-ci.org/paritytech/parity-bitcoin.svg?branch=master">](https://travis-ci.com/paritytech/parity-bitcoin)
 * **Database**
   * [pingcap/tikv](https://github.com/pingcap/tikv) — a distributed KV database in Rust [<img src="https://api.travis-ci.org/pingcap/tikv.svg?branch=master">](https://travis-ci.org/pingcap/tikv)
   * [PumpkinDB](https://github.com/PumpkinDB/PumpkinDB) — an event sourcing database engine [<img src="https://api.travis-ci.org/PumpkinDB/PumpkinDB.svg?branch=master">](https://travis-ci.org/PumpkinDB/PumpkinDB)