Perfume Factory

Here is the list of various source code search engines. These let you search actual code in open source projects accumulated over the Internet.By using these source code search engines, developers can avoid the wastage of time spent on writing the lines of code for certain functions that are already exist and free to use.

Reuse is the main motive of this post.

Here goes the list

http://www.krugle.com/

http://www.koders.com/

http://www.google.com/codesearch

http://labs.oreilly.com/code/

http://www.codefetch.com/

http://www.jexamples.com/

http://csourcesearch.net/

http://kelpi.com

http://lxr.linux.no/search

http://www.ucodit.com

http://www.codase.com/

http://www.allthecode.com/

http://www.quickref.org/

http://www.bytemycode.com/

http://www.planet-source-code.com/

http://jsourcery.com/welcome/home.html

http://www.merobase.com/

For better results, search on multiple source code search engines as source code displayed by one engine may not be displayed by another or vice versa.

The above list contains almost all existing source code engines. I will be updating this list as I find out new source code search engine.

Readers are also encouraged to comment it here if they find or knew any new source code search engines.