yalps
Yet another linear programming solver. (A rewrite of javascript-lp-solver.) Aims to be decently fast.
scrabble-solver
Scrabble Solver 2 - Free, open-source, cross-platform, multi-language analysis tool for Scrabble, Scrabble Duel, Super Scrabble, Letter League, Literaki, and Kelimelik. Quickly find the top-scoring words using the given board and tiles.