Minecraft seasons http://www.minecraftforum.net/topic/499733-173134the-seasons-mod/ . I haven't used this mod but i watch a series and it has the mod in it. http://www.youtube.com/watch?v=3gl5NOVFOOo&feature=sh_e_se&list=SL

Minecraft Leprechauns http://www.minecraftforum.net/topic/620598-v173-luckycharms/ I haven't seen this mod but it sounds cool.

Minecraft dinosaurs http://www.minecraftforum.net/topic/160263-16-jurassicraft/ I haven't seen this mod but it sounds cool.

Zeppelin mod http://www.minecraftforum.net/topic/488434-173-zeppelin-012-wip/ In this mod you can create anything into a airship.

Pokemobs http://www.minecraftforum.net/topic/519098-173-the-official-pokemobs-v043/ Adds Pokemon in minecraft.

Here are more http://www.minecraftforum.net/forum/51-released-mods/