Perform Complex Calculations with Free eCalc

eCalc is a free Web-based calculator that can handle everything from basic addition and subtraction to logarithms, cosines, and unit conversions. Not online? There's a new desktop version of eCalc for Windows that's also free, though it's just the basic calculator -- you'll need to the hit the Web if you want all the fancy functions.

Either way, it's an impressive tool: attractive, easy to use, and designed with large buttons for those with less-than-stellar eyesight. I think students have the most to gain from this fabulous freebie (no need to drop $100+ on a scientific calculator), but obviously it's handy for anyone needing to calculate, well, anything. Scientists, realtors, accountants, engineers -- this is one tool you'll definitely want to bookmark (or download). [via Download Squad]