I was thinking of maintaining a map-of-maps for this year. Basically a map showing the outlines of maps I've made in 2015. For the time being, I'm putting it up on Google Fusion Tables, maybe I'll do a proper map at the end of the year.
I've rigged up a little FME workbench that takes the bounding box of a map I've produced (exported as a shapefile from whatever application I've used to produce it) and upload it to Google Fusion Tables along with some additional information such as the date, map title, and a description of the project.
Not a whole lot in it right now:
I haven't found a way yet of only sharing the map (I'm not sure whether I necessarily want to share the table by itself, or have it be downloadable), or how to have overlapping maps clickable. Suggestions are welcome of course.