Mod Organizer is an advanced program to manage your mods. It has many functions and tools and, like NMM, you can also integrate applications (i.e LOOT and TES5Edit) within it.

It is released under the GNU General Public License and the GNU Lesser General Public License (LGPL). For developers, the source code can be accessed at SourceForge.

Developer: Tannin.

Once you get used with Mod Organizer, your mods management will become much more practical.