L.A.M.P. refers to a toolset consisting of Linux + Apache + MySQL + PHP|Perl|Python|Postgresql... providing a powerful framework for rapid development of robust solutions. Each component is open source and has proven to be enterprise ready.
Apache Friends is a non-profit organization based in Germany with similar goals as LAMPgroup. They have been running since 2002 and I have used their XAMPP (Apache/MySQL/PHP/Perl/MyPHPAdmin/Webalizer...) prepackaged stack for a couple of years on both Windows and Linux.
XAMP also provides a nice admin tool to start and stop the services and is easy to deinstall.