This is a master list of all of the APIs that I operate, and I make publicly available for anyone to use. Each API is intended to operate independent, within its own portal, but taking advantage of some common elements. Just click on the name of the API and you will be taken to its specific portal.
These are all my APIs I have developed for my own purposes, but do not mind sharing access with the public, and even deeper relationships with partners. My API stack is always changing and evolving, so if you are looking for something in particular -- let me know. You should be able to find everything you need within each APIs portal.