This October we decided not to make a game, but to wrap up some of the scripts we use for Unity and release them on the Unity Asset Store. We managed to sell for more than 1$ so I guess I’m sort of participating!
This is not advertisement. Don’t buy them if you don’t need them, this is just to show what I spend my October challenge on.
2D IK Solver:
https://www.assetstore.unity3d.com/#/content/11904
This package implements a fast and precise solution for the two-bone inverse kinematic problem in 2D.
Take a look at webplayer demo to get an idea. (source included in the package).

GameObject Lock:
https://www.assetstore.unity3d.com/#/content/12228
This utility allows you to lock GameObjects in the scene so that they will not be moved by accident.
