Update README.md

Author: dejurin

README.md

@@ -137,6 +137,7 @@ If you want to see current configuration, run `sudo sysctl -a`.
 
 ## References
 * [PHP Framework Benchmark](https://github.com/kenjis/php-framework-benchmark) ([@kenjis](https://github.com/kenjis))
+* [moneyconvert](https://moneyconvert.net/)
 * [wrk](https://github.com/wg/wrk) - Modern HTTP benchmarking tool
 * [PHP-Router](https://github.com/dannyvankooten/PHP-Router) ([@dannyvankooten](https://github.com/dannyvankooten))
 * [FatFree](http://fatfreeframework.com/) ([@phpfatfree](https://twitter.com/phpfatfree))