Here is a hack for Ninja Gaiden which changes the level layouts, adds new powers to the game, and adds some palette changes.
Ninja Gaiden (U) [!].nes - GOODNES 3.14
CRC32: 11F953F6
MD5: 0C2CCCDA6BA6CAB7BEDE0FF05E7F6852
SHA-1: CA513F841D75EFEB33BB8099FB02BEEB39F6BB9C
SHA-256: 07D9E57E35184667C7B89E30857A44C5C404B48332AD12E66BE91100ECCD4F5E