Kerbal Enhancement Project (KEP) by Shinsaka
KEP forum thread: http://forum.kerbalspaceprogram.com/threads/87871
Patch forum thread: http://forum.kerbalspaceprogram.com/threads/97599
Patch download: http://kerbal.curseforge.com/ksp-mods/225017-kerbal-enhancement-project

Includes ModuleManager by sarbian
http://forum.kerbalspaceprogram.com/threads/55219

Includes fixes and parts from StockRebalance by stupid_chris
http://forum.kerbalspaceprogram.com/threads/75272

Includes fixes from OCD Fixes Pack by Absolute Human
http://kerbal-space-parts.com/space/modpart-ocd-fixes-pack-161.html

Includes parts from SXT by Lack
http://forum.kerbalspaceprogram.com/threads/79542