wija is a testbed for pursuing all possibilities of communication on the Internet. Using wija, you can send messages instantly to your friends, chat, and share presence information with them. wija is integrated with GnuPG, so that you can make your communication secure; you can encrypt and/or digitally sign your messages, and sign your presence if you prefer. But those are not all wija is about. It can be extended freely and easily by adding plug-in modules. Such modules may be bundled with our distributions of wija, or independently developed and distributed. By developing your own modules and plugging them into wija, you can try out "everything you can do over the Internet" yourself.