Simplix Calculator is a neat little command-line calculator with the basics and some handy advanced functions. All the operation will be saved in a log file.

Here is the brand new release with:
1. Basic operations
2. Exponents, squares, and square root tools
3. Pythagorean Theroum and the quadratic formula
4. Sales tax (California only at the moment)
5. A basic geometry section

The license of this software is Free, you can free download and free use this calculator software.