[CARTxxx Utilities] - Can be used to extract info from Genesis, SNES, GameBoy, and TG-16 carts and to check to see if they are corrupted. 
(Released: ?/??, size: 170k, DOS) 

[Magic Engine Header Tool] - Helps you organize your ROM images. 
(Released: ?/??, size: 170k, DOS) 

[Magic Kit] - An assembler for the PCE: Now you can program your own demos and games. 
(Released: 3/98, size: 83K, DOS) 

[ROMEDIT] - A program that lets you edit the text within games. Currently, ROMEDIT supports NES, SNES and Gameboys ROMS and claims to even work for Genesis and TG16 ROMS. 
(Released: ?/?, size: ?.?k, DOS)