SpeedCrunch is a fast and compact calculator. It is designed to be controlled using the keyboard. There is support for a few built-in functions (with an autocomplete feature) as well as variables. The result is shown in a scrollable window, and a history of expressions is available with up and down arrows.
License: GNU General Public License (GPL)
Changes:
This release adds significant improvements to the user experience such as the full-screen mode, on-the-fly language change, a user-friendly math book, rewritten session management, batch calculation, complete support for right-to-left languages, and many other small touches as well as bugfixes. In addition, it can be compiled in "portable" mode (especially on Windows platforms) so that it can run from a USB memory/pen drive.
More...