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Over 300 apps including wxMP3gain (Apr 22, 2015)
Someone on The Admin Zone Forums at the thread http://www.theadminzone.com/forums/showthread.php?t=87188 mentioned a WAMP server could be acquired here. IS that true>
Actually, we just provide a launcher to integrate it with the PortableApps.com Menu. You can use the version available in the official website.
And, by the way, XAMPP is also available for Linux, Mac OS X and Solaris too.
Previously known as kAlug.
There is XAMPP: http://portableapps.com/apps/development/xampp
[EDIT]: And, looks like I'm too late.