My collection of dodecahedral puzzles is barely scratching the surface. The megaminx alone has a ton of varients with diferent numbers of layers, or with no centres (like the void cube). Search for images for gigaminx, teraminx, petaminx, examinx. Look also at holey megaminx and flowerminx. I'm sure there are plenty of others.
I've done guides on my youtube channel for the Pyraminx Crystal and Megaminx. The 3x3 mod is solved like a 3x3 picture cube. Guides are also on my channel, but there are links for those guides here in the solutions board. Most of the solve guide vids posted here are from my channel, but I've not got direct links for Pyraminx Crystal or Megaminx since they are not produced by Rubiks.
I'm sure youtube will give you guides for the Skewb Ultimate, and maybe even the Alexander's Star. This last one might be harder to find a guide for since it's a harder puzzle to find. If youtube doesn't help, try googling for Jaap's Puzzle Page.
Oh, I forgot. I also have a Starminx:
Please take off topic discussion off this forum. Thanks.