eForum
eForum is an easy-to-install discussion board that doesn't require any database. Features include admin area to delete topics with session authentication, a search system (more stable this version), configurable layout using css file. Moderator can be notified of new posts on the forum. It has threaded view. Ubbcode-style supported. Multiple languages supported: Portuguese, English, German and Danish. UPDATE 0.4: post preview, better ubbcode support, better javascript, other small changes, some bugs fixed, italian and turkish translations.