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zsbc is a bc-language calculator working with libgmp
...zsbc was created just for fun and to work on cryptographic topics.
It can handle an expression like
2^10^100%97 (it'll replace it with powmod(2, 10^100, 97) on-the-fly).
It can also implicitly calculate invmod's as in:
1/4%7 that (if variable autoinvmod is set) will return 2.
HexTool is a simple yet effective calculator/tool; invaluable for people who work with Hex and Binary. Now you can convert between Hex, Binary and Decimal on the fly. No install needed: just unzip and run it!
In my line of work I create promotional deal sheets with InDesgin and sometimes need to work out promotional discounts displayed graphically on the sheets as a percentage off. Although excel is useful for this I wanted to do this on the fly without excel and without having to reach for the calculator. So I created this very simple tool to do exactly what i needed and although it may not come in useful for everyone it might come in useful for someone so I decided to share it here.
Console based notepad number cruncher makes calculations fast and simple, yet with ample features under the hood. With log turned on, you can record your session on-the-fly from any open instance of the program.
MaDiCal was developed to calculate the length of training runs or cycling tours.
It loads map images in GIF format.
The user first defines the map scale in one of several units and just clicks along the track. The length is calculated on the fly.