I use FileAmigo to track my sims.
I show pics here:
http://isleofthyme.squarespace.com/backtalk/the-nerve-center-of-thyme-my-fileamigo-database.htmlSince Sims2DB is no longer updated. My database does everything that program did.
As to the OP's question, I use my own calendar, to track of my families ages. Makes it much more interesting.