Free42 v1.5.2 is released. Free42 is a complete re-implementation of the HP-42S scientific programmable RPN calculator,was made from 1988 until 1995 by Hewlett-Packard and the HP-82240 printer. Free42 was written from scratch, without using any HP code. You do not need any ROM images in order to use it, yet it is fully HP-42S compatible.

Free42 v1.5.2 Changelog:
- Decimal version: fixed Y^X for complex Y and negative integral X.
- Decimal version: made Y^X and 10^X for real Y and integral X more accurate.
- All versions: sin(45°) now equals cos(45°), and sin(50grad) = cos(50grad).

Download: Free42 v1.5.2
Source: Here