A chess program written in System RPL and assembly language. It supports three different levels, board editing, one/two player mode, en passant, castling, opening book with 600 halfmoves, save/load games and more.
Simplex is an LP solver program for the HP 49. It is written as a single System RPL object for speed and easy installation. It can do exact arithmetic to avoid round off errors, but also works in approximate numeric mode. There is also a step-by-step mode available.