GnomeCruncher
GnomeCruncher is a multi-line calculator. It has all of the basic math functions as well as the trig functions, natural log, and log. The constants e and pi are also defined. The last result is saved in a variable called ans. You can also save calculations in custom variables.
There are a few configuration options that let you set the width, calculation history growth direction, number of digits to round off, etc.
And yes, it's available on Wowace SVN.
This looks like an awesome idea, I'll try it out. You should consider using the wowace.com svn, though. It makes updating so easy for us Ace2 fans, and is a great organization tool.
This is a great idea! I've always wanted an in-game calculator!