The software on the calculator (and the software that was used to design the calculator) is all free software too. The calculator runs Linux (of course) and a free TI simulator environment in the ...

In such cases, a date calculator is your best bet. Avoid cumbersome calculations and measure percentage changes, percentage difference between two values instantly with this easy-to-use percentage ...

Also, if you use a calculator quite a lot, this tool will save you some time. Or if you are a keyboard-only person, you will love this tool. Alt1 is free and open source, so feel free to download ...