Help is a microblogging service -- a way for you to tell your friends and fans about what you're doing, wherever you are. You can post small (140 characters or less) texts to the site, and all your friends who "subscribe" to your posts will receive messages from you.

The code is available under a Free Software/Open Source license, which means that you can set up your /own/ microblogging service. It supports the OpenMicroBlogging standard, so that people using different services can subscribe to each others notices with as little work as necessary.