Vanilla is an open-source, standards-compliant, multi-lingual, fully extensible discussion forum for the web.
Anyone who has web-space that meets the requirements can download and use Vanilla for free! In Vanilla you can quickly and easily see which discussions you haven't read, and how many new comments are in each discussion. You can run advanced searches through discussion topics, comments, and users. You can change the way Vanilla operates using per-user preferences. Finally, you have a very customizable account profile where you can provide pictures of yourself and add as much information about yourself as you like.