These were all written for my own fun of exploration/experimentation, but they might be useful to you too. For the freeware, feel free to redistribute, host, and make whatever use you can from them.
Disclaimer: Although no known harmful bugs are present in them, I do not guarantee the absence of unknown ones. So accept the possible risk and use these by your own choice. However, I do want to hear if any serious problems occur with them. After all, I use these on my computer too and do not want to do any damage to it either! :-/
System requirements: A very old computer will run them fine (1992-1998, 25MHz+). For the DOS utilities, you may need to use DOS Box under Windows 64bit, since the DOS subsystem is mostly unsupported post WinXP. They are stand-alone, no-installation apps.
Source code: If you are interested in the source code to any of the programs, just send a letter to me.
This program is now quite old, and its worthy successor vSNES will probably serve your needs better. This utility views the frozen scene of a ZSNES savestate and exports graphics to help make maps of the levels in all those classic SNES games. It can export them without HDMA effects or mode 7 distortion that typically hinder map-making.
SpriteView is a small, speedy graphics viewer (not editor) that supports several formats (~18) of console systems (including all of those used by the SNES).
Tilemap Viewer (DOS)|
TileView displays the byte/word arrays in a file as colored blocks to aid in finding tilemap patterns, including levels, map screens, and other anamolies. It's like a visual hex editor (minus the 'editor' aspect), than instead of showing hex numbers, shows their colors.
Spc2Midi (DOS/Win alpha)|
This experimental project plays SPC captures and exports them to MIDIs. Although the emulation core is finished and the sound output is decent, the most important part of it, (SPCs 2 MIDIs) is only partially finished. The excellent SPC Tool has since come out which does almost everything I intended for mine to, so I suggest you use it until then.
UpFront is a front end written by CyBeRGoth to simplify starting my utilities under Windows. It sort of makes up for the lack of an internal file opener in them.