Rise of Nations Tribe Mask Tool by Cassius Allanus
This program requires .NET Framework 2.0 to run. To obtain .NET Framework 2.0 run Windows Update or visit http://www.microsoft.com/downloads/details.aspx?FamilyID=0856eacb-4362-4b0d-8edd-aab15c5e04f5&displaylang=en to download it manually.
The program itself is pretty self-explanatory. You input a tribe mask and the list automatically checks off which civs are on/off in the tribe mask. You can also check off civs yourself and program will generate a tribe mask for you. This can be set to work for either vanilla Rise of Nations or Thrones and Patriots.