HLPlanner is a free software program that uses the VPM-B algorithm to calculate mixed gas decompression. It was written in C# and optimized, with the core of the algorithm remaining identical to Erik Baker's public domain Fortran 77 code. The program has an easy-to-use and highly functional user interface and supports a full range of gases and profiles, with full support for both imperial and metric units. It also has an automatic selection feature.
