Which coding language should I use?

I want to make apps and mods for minecraft. Which language for apps would be the easiest to learn along side of java? Cross platform would be preferred, but if there's a language very similar to java that only runs iOS or Android, I'll take it. I'm just getting started so any recommendations on ways to learn would be appreciated. TY!

Good $880 Gaming PC for youtube?

So i have $880 and i want to build a good gaming pc for running games like:
Black ops 2
Minecraft
Team Fortress 2
Counter Strike
Garrys mod
GTA 4
GTA 5 ( When it comes out on pc. )

I don't need an os all i don't want a monitor. And with shipping i want it to come out to $900 max.

I want to download The Aether Mod for Minecraft?

How do I get The Aether Mod? Could you possibly tell how much space it takes up, how to delete it, and the best place to download it? (This might help: I have Windows 8.) Thanks.

Minecraft Enderwolf mod requested?

So I've seen some youtube videos about wolf mods and one thing I really like is the Enderwolf and I was wondering if it was just possible to get a mod with just that wolf added only. Now the one I've seen was on a mod called "Wolves +" Now a couple of problems I've seen with this mod on youtube, one it spawns other wolfs, this is bad because I only want the Ender wolf, two they spawn naturally in the wild and I really don't like that, I rather just own, spawn with an egg in creative or even just turn one of my dogs into them instead of having them just show up normally, I don't want the mod to effect normal wild game play, and 3 the enderwolf I've seen on the mod does not teleport or have ender particles floating around like the real enderman does, and 4 I'm not sure but I think it's eyes changed to green in the mod and that's no fun because enderman has purple eyes at all times. Now I'm just a newbie who knows nothing about mods but if someone knows any way I could have or make this happen it would be awesome.

Why won't my minecraft world show up?

I was trying to get optifine to work with forge without crashing, and I pulled optifine out of my mods folder. When I went back into the game, my world no longer showed up as an option even though it still shows up in the saves folder. I have completely reset the version and yet it still will not show it, though it still shows my other world.