Below is a pdf export of a mindmap I am working on that summarizes (a
very small fraction of the) different approaches for solving POMDPs.
As I read about new methods I include them in the map, so you are
likely to find several mistakes and incomplete sections. This one is a
recent version with no equations. You can click on it to get a larger
view.
I keep a (growing) Zotero library with articles that describe different approaches for solving POMDPs. You can visit it here (the collection is called ‘pomdps’).
Have a look at the code page.