I need a program to read the US Census's geodatabase files

I downloaded a file from [here](http://www.census.gov/geo/maps-data/data/tiger-geodatabases.html) , and got something with extension .gdb.zip. I want to get one of the tables out of this "geodatabase" and into a format that's easily accessible to other programs; csv or some such would be the obvious goal but anything moderately open will work. The Census Bureau's description of the files is: > TIGER Geodatabases are spatial extracts from the Census Bureau’s MAF/TIGER database for use with Esri’s ArcGIS. Since ArcGIS for home users costs $100, and I don't want any of its features other than the ability to read this file, I'm hoping there's an open source option.