Legislative Explorer is an interactive tool that lets you explore what actually happens in Congress — which bills are introduced, where they go, and what their ultimate fate is. You can animate each individual Congress to watch bills move through the process (or not). You can sort by individual lawmakers, parties, topics, committees, and more. Just watching one of the animations is well worth the visit.
This tool was developed by University of Washington political scientists Nicholas Stramp and John Wilkerson. For more on its origins, see this article (gated). Here is a news release about the project. Here is more on the data. See also Wilkerson’s book with Scott Adler, “Congress and the Politics of Problem Solving.” Their related blog is here.