<p>Looking for a GUI calculator tool for Linux. I haven't been happy with any of the options I've used to date (currently using KCalc).</p><p>Requirements:<br />* Easy base conversion including clickable on/off bits for encoding/poking register bitfields</p><p>* Allows typing arbitrarily complex algebraic expressions and evaluates them only when you hit enter, with free editing up to that point. KCalc starts parsing and evaluating stuff as you type so if I type 3 + (1 and then want to backspace or add some other stuff, I can't delete the parenthesis because it's already pushed the parser stack or something.</p>