Features:

The following details were retrieved directly from the InvisionFree website

• Upload attachments to posts.
• Permissions for members and groups to read/create/reply/upload per forum.
• Customizable skin, images, smilies, and logo.
• PM (Personal Messenger) System.
• Warn/Suspend/Ban users.
• Forum Portal.
• Calendar.
• Banning and Word Filters.
• Topic Multi–Moderation; a quick way to perform several moderation action in 1 click.
• Pinned (Sticky) Topics.
• Support Tickets.
• No pop–up advertisements.