These are the APIs I offer up as part of my API Evangelist platform. All of these APis have something to do with the API sector, and usually are focused on providing APIs, but I will also link to my other API related projects that may also be more about consuming, and aggregating APis.
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.