I found a couple cool Seeds, Mods, Texture packs and wanted to Share and see if you had any to share as well! Here's a few I thougth worth mentioning.
Lost Island Seed
-232085906
A single island with 1 tree nothing else around for blocks! Its a challenge to get started and surviving the first night what tools to make with what little wood you have? Will you find what you need in time?
Timber! mod
A mod that chops the whole tree down. If you use an axe on a tree all the wood above the block you destroy will also fall.
http://www.minecraftforum.net/topic/119361-100-tehkrushs-mods-plasticcraft-v23-timber-and-more/
Enderman Block mod
This mod, available for single player and servers, keeps Enderman from moving around blocks and making a general mess of things.
http://www.minecraftforum.net/topic/631622-101100-endermen-dont-pick-up-blocks-mod-singleplayer-multiplayer/
Mo'Creatures mod
A fun little mod that adds more creatures into your game. Horses (that you can tame and ride), goats, cats, foxes, wild cats, bears...werewolves. It also adds a few new monsters too, wraiths and several breeds of ogers.
http://www.minecraftforum.net/topic/81771-v100-mo-creatures-v31-with-goats-jellyfish-mantarays-and-stingrays/