Data on the site comes from:

• The Library of Congress and the Congressional Research Service via THOMAS for the status legislation, subject terms of bills, etc.
• The House of Representatives and the Senate for information on Members of Congress, committee membership, voting records, and upcoming committee meetings.
• The Government Printing Office for photos of members of congress and the text of legislation.
• The Office of Management and Budget (OMB) (executive branch) and Congressional Budget Office (CBO) (legislative branch) for reports related to bills.
• The Congressional Biographical Directory and the independent Congressional Committees, Historical Standing Committees data set by Garrison Nelson and Charles Stewart for biographical and historical information on members of Congress, including congressional district assignments.
• Project Vote Smart for their bill highlights.
• Congresspedia for their bill pages, out of which I show excerpts.

But GovTrack wouldn't be fiscally possible without the many open source projects that have developed software powering this site, including:

• RedHat/Fedora Linux (Apache, MySQL, Perl, etc.)
• Mono, the open-source .NET
• The GD drawing library for various images
• DotLucene (Jakarta Lucene ported to C#) for searching bills and the congressional record
• Doug Rhode's SVD C Library to perform the mathematical analysis for the political spectrum
• Michael Gastner's cartogram program for creating cartogram maps of voting records.
• Autosuggest / Autocomplete with Ajax v. 2.0

Thanks to all of the people that made these open source tools available.

The server powering this site is located at Rimuhosting.