I have a warm place in my heart for Pidgin. For a long, long time I had to deal with IM clients that wouldn't let you sign in more than one account per instance

I have a warm place in my heart for Pidgin. For a long, long time I had to deal with IM clients that wouldn't let you sign in more than one account per instance, and some of them used mutexes to prevent running multiple instances. It looked like hot dog vomit, but it worked wonderfully.