Maybe this is of intrest for You, its a complete list of the extra Joomla Components, Modules and Plugins used on this website.

Most of them will get there own page withe the description on why and how they are used:

Components

• sh404Sef
• Joomap
• IrcMaxell Page Cache
• JoomlaXplorer
• SM2 DB HealthCheck
• RD Glossary
• DS Syndicate

Modules

• Related Items XTD

Plugins

• JoomlaFCK
• RD Next and prev Links
• RD Read More
• SM2 Bot Session
• Related Items Bot

Hacks and Other Extras

• SEF patch from Joomlatwork
• Statcounter
• Google Analytics