Below is a list of the programs I use to make tilesets. If you're thinking of making a tileset, I highly recommend downloading these and giving them a try.
I've used them all for years now and they do a great job.
|Paint Shop Pro||The most versatile image editing program available. It's like this program was made to make tilesets. The amount of features are endless, give the demo a try now!|
|TeraLogic Texture Maker||A great program to make textures, and in the case of tilesets, textured backgrounds. Comes with enough features for the professional user, but also has a very easy way to make textures for someone less experienced.|
|Palette Suite 3.01||The greatest palette editing program I've come across, and it's made by Toxic Bunny from our very own Jazz 2 community! This is a must download if you plan on making tilesets.|
|TilesetPal 1.1||Another very useful program, and this one was created Monolith. It comes in handy for editing palettes and most notably reducing the colors of images. I personally like it because often times it does a much better job of reducing colors than Paint Shop Pro and other programs. -BlurredD|
|Default Jazz 2 Palette||This is the default Jazz Jackrabbit 2 palette in .pal format (used with Palette Suite and Paint Shop Pro). This palette is a must for every tileset, and a great starting point for someone who has no experience with palette editing.|