Bot Sentry is a Pidgin (libpurple) plugin to prevent Instant Message (IM) spam. It allows you to ignore IMs unless the sender is in your Buddy List, the sender is in your Allow List, or the sender correctly answers a question you have predefined.
This is the Skype API Plugin for Pidgin/libpurple/Adium. If you're already running Skype, you can have your Skype contacts displayed with your Pidgin/libpurple/Adium contacts. It is intended as a complete replacement for the Skype user interface, hopefully everything you can do in Skype you can do with this plugin.