OK, another quick one from me. This time it's a small plugin I've named Flitter, so called because it handles Facebook, Twitter and Google like/share buttons.
Quite a few pictures to cover off. Picture 0 shows the new admin icon. It's not a particularly nice icon but it shows that it can be done and the plugin naturally will demonstrate how to achieve doing it yourself.
Picture 1 shows the plugin settings page. This is actually purely internal; there's no custom template for the admin settings here, it's all using the internal settings template, just more thoroughly than most might realise is possible.
Picture 2 shows it added to the sidebar, while picture 3 shows it added above the topic.
I should again reiterate the usual with these plugins: there's no file edits, no voodoo, it's all making use of the systems provided by the underlying system to achieve these things.