ResidualVM, a sister project of ScummVM, is an interpreter for 3D adventure games. Currently, it supports Grim Fandango and Myst3, but some work is being done on supporting Escape from Monkey Island.
ppcrack decrunches all types of Amiga PowerPacker files, including encrypted files. It does not need the password. It can crack the correct decryption key within a few minutes. It also has a dictionary attack for immediate decryption.