Honors of open source , in my research [closed]

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I fall in love with Open-Source and it is my research topic. Can you tell me some honors of open-source world? I know some of them,such as mysql(DBMS),Ogre(graphic engine),Apache(Web Server) and more开发者_StackOverflow社区?

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I would say Linux itself is the biggest one!

And Firefox for web browsers.

http://xkcd.com/198/

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The majority of scripting languages are Open Source, like Perl, Python, Ruby, AWK, Lua... Then of course the majority of Unix and Unix-like operating systems (to a degree), like FreeBSD, OpenBSD, NetBSD, OpenSolaris (though Oracle now doesn't seem to publish new versions), Linux, Minix, Plan 9.

But in general: name any IT field and you'll find OpenSource projects for them. Have a look at FreshMeat.

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Open/Libre Office as the main Open Source alternative to MS Office, or the Gnumeric spreadsheet program as an alternative to MS Excel.

PHP, Perl, Python, and other scripting languages.

Take a look at this list on Wikipedia for OS software covering a whole range of application types