Source Code Pro was designed by Paul D. Hunt as a companion to Source Sans. 
This complementary family was adapted from the Source design due to a 
request to create a monospaced version for coding applications.

Source Code Pro currently supports a wide range of languages using Latin 
script, and includes all the characters in the Adobe Latin 4 glyph set. As 
an open source project, it is expected that incremental updates will be 
made over time to extend glyph set coverage and functionality.

WWW: http://sourceforge.net/projects/sourcecodepro.adobe/