UwAmp is described as 'Wamp Server with Apache MySQL PHP and SQLite, and it comes with an very smart interface that offers various information, configuration and commands for the server. It can handle multiple php versions and monitor cpu usage. Also it is able to run in U3 mode' and is a Web Server in the development category. There are more than 25 alternatives to UwAmp for a variety of platforms, including Windows, Mac, Linux, Self-Hosted and Redis apps. The best UwAmp alternative is XAMPP, which is both free and Open Source. Other great apps like UwAmp are WampServer, MAMP, AMPPS and The Uniform Server.
XAMPP is bad to manage Apache, PHP versions etc. UwAmp can have them installed side by side many different versions with a single click switch. And back in the days it was working it was able to pull PHP of any version right from php.net.