A table with notes about each Roman king's reign. The file is a Microsoft Word document formatted to fit on a 4x6 notecard. Simply print it out, cut it out, glue it to a 4x6 card (recommended), and then add notes on the other side.
Here are some of my notes from Cary & Scullard's History of Rome.
A list of named Roman laws compiled from Cary & Scullard's History of Rome.