If you're not a big fan of certain biomes then myBiome is the perfect mod for you. It's easy to remove/delete any biome including the annoying ocean and desert biomes!
Once you have the mod installed - go into single player and choose create new world, you should see the myBiome options. This button opens a new screen where you can enable and disable any biome in the game.
Not only can you disable biomes but there's also the Add Custom Biome button which lets you create your very own biome. You can choose the biome name, layer 1 resource type and also layer 2 & 3 types. So for example you could set layer 1 to be diamond blocks and layer 2 & 3 could be stone. More layers should be available soon but it's good to only customize the surface layers so deeper layers remain intact.
Tip: Remember not to disable all biomes otherwise the mod kills Minecraft!
Price: $0
Size: 4MB
Released: 12/2012
Type: freewareCategory: Games
OS Support: Latest versions of Minecraft (official)
Keywords: minecraft, minecraft mod