This is what i have accumulated through out my jam.
The library have several helper class to help do things like IEnumerable shuffling, Vector2 math, comparing float with small precision, get points that are <North,West,South,East,NorthWest,...> from a point, get direction of a point compare to another point (North,West,South,...)...
The library have a set of simple UI element to help with making UI for the game.
The library have a Screen manager that manage game screen, and screen transition.
The library have a range of drawing thing onto texture2D, you can combine a set of texture, put in an Action<SpriteBatch> to draw on a texture.
The library have a Animation class that help deal with 2D sprite animation.
The library have an implementation of Dijikstra algorithm.