Cube Explorer or ksolve if you're looking for algs in general, but for last layer algs,
Birdflu has every LL alg up to 17 moves, which should save you a lot of time in generating them. (Every LL case can be solved in 16 moves optimally, and only very rarely you'll find that an 18-move-or-longer alg happens to be more ergonomic than all the algs in Birdflu.)