There is quite a choice of web comics around the web, and sometimes one can even find the good ones. «Existential comics» manages to be both funny and interesting, providing an overview of major philosophical ideas and schools of thought – usually by picturing their comical applications in a variety of settings, e.g. philosophers playing board games, such as D&D and Risk.
Contrary to the name, it is not limited to existentialism, and exhibits different philosophical traditions; neither it seems to be limited in topics (a reminder: philosophy is about a bunch of pretty different things).
The comics may assume familiarity with their topics, but each page contains a brief explanation of what is going on in a strip.