XAMPP
XAMPP is a completely free, easy to install Apache distribution containing MariaDB, PHP, and Perl for Windows, Linux and Mac.
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MAMP
MAMP stands for Mac, Apache, MySQL and PHP. It is a free, local server environment that can be installed on Mac and Windows.
AppServ for Windows
AppServ is an merging open source software installer package for Windows which provides us an easy way to configure Apache, PHP, and MySQL on our local computer.
Fiddler
Fiddler is a free Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet.
YouBlocker – YouTube Ads Blocker for Mac
YouBlocker is the best YouTube ads blocker for Mac. Finally, you can listen to your favorite music and watch YouTube videos without ads.
WebDAVNav Server for Mac
WebDAVNav Server is a free, basic, lightweight, fast WebDAV server which can be used to quickly share files and folders from your Mac with other computers, mobile devices and apps.