Standard Free Forum Features: General
Advanced permission and user management.
Tracking of new and old unread topics, not just from your last visit.
Designed for optimal performance and scalability.
Multi-media output: XHTML, XML, RSS, WAP
Search the entire forum, a category/board or within a topic.
Search within your personal messages.
Ability to send a topic to a friend.
Security
All actions seamlessly require a session based authorization code.
Administrative actions require the user's password (and do not rely solely on cookies).
Major actions are time and IP locked
The number of login attempts from a certain IP can be limited and time locked.
Forum Settings
Put a board into maintenance mode, allowing only administrators to log in.
Word censoring, either full word or partial.
Ability to break up long words.
Boards and Categories
Reorder boards within categories, or reorder categories.
Create child boards under other boards (sub boards).
Assign moderators to boards.
Allow certain membergroups to access a board, including guests only.
Configure permissions for each membergroup on the board level.
Ability to indicate new posts to child boards but nothing new in parent.
Member Registration
Require a user to agree to terms before they register.
Disable member registration completely (allowing only administrators, or moderators with the necessary permissions, to register people).
Require email authentication by sending an authentication link.
Require an administrator, or moderator(s) with the necessary permissions, to approve registration.
Register new members from the admin center.

Member Tracking and Tracing
Sortable and searchable public memberlist (accessible by a permission).
Powerful sortable and searchable admin memberlist.
See who's doing what (accessible by permission).
Statistics
Several board statistics (accessible by permission).
Tracking of member's online time in seconds.
Tracking of topics, messages, new members, and hits per day.
Individual member statistics accessible from their profile.

Membergroups
Create membergroups to group members on permissions, access rights, and/or appearance.
Assign several membergroups to a single member, with one membergroup as the primary group.
Define membergroups that are auto-assigned based on the amount of posts a user has.
Determine the maximum number of personal messages a membergroup is allowed to have by group.
Assign badge or star to a membergroup - by primary group.
Determine which membergroups are allowed to access a board.
Banning

Ban members based on their username, email address, IP address or hostname.
Support of wildcards for email address, IP address, and hostname.
Include a ban reason (viewable for the banned user).
Include a ban note (only viewable by the administrators).
Choose between full ban, no post ban, or registration ban.
Include an expiration time for bans.
Wireless access

Support for WAP, WAP2 and I-mode protocols.
Browse through boards/topics/messages with reduced page size.
Ability to login and logout.
Ability to see new topics/boards with new replies.
Ability to jump to first unread reply.
Ability to post new messages.
Posting Features

Quick Reply
Members can disable it or collapse it.
Can be used with "Quote".
Vast number of Bulletin Board Codes to use (including rtl, acronym, and others).
Optional editing grace period before a post is shown as modified.
Insert Quote feature on posting screen to quickly quote previous replies.
Polls

Can be added or removed to existing topics.
Ability to set expiration date.
Ability to hide results till expiration of poll.
Ability to hide results until after people have voted.
Ability to determine how many votes a user may cast.
Polls can have up to 256 options.
Attachments

Allowed on a per member group or board basis.
Optional restriction on what filetypes may be uploaded.
Ability to restrict such that only registered members can view them (disables hotlinking, mostly).
Images can be embedded into posts.
Calendar Supports

Shows Birthdays, Events and Holidays.
Display calendar information on board index.
Link an existing topic to the calendar.
Allow only certain members/groups to post events.
Event poster can edit event.
Events can span multiple days.
Moderation Tools

Ability to lock and unlock a topic.
Topics which are locked by an administrator can not unlocked by anyone else.
Ability to allow members to use moderation on just topics they posted.
Report to moderator link.
Delete or modify posts.
Ability to merge/split topics.
Move or delete topics.
Sticky or unsticky topics.
Recycle bin/board for all deleted topics and posts.
Moderation log which shows moderation activity and dissallows the removal of log entries until they are at least 24-hours old.
AJAX editing:
Edit a post without page reloads.
Double click to edit topic subjects on message index.
User Profiles and User Options

Ability to hide your email address from the public.
Email notification
New topics per board.
Single topics.
Private messages.
Login with invisible mode.
Options to hide other members' avatars and signatures.
Ability to download and resize uploaded avatars.
Personal text, avatar, signature, and all the niceties of forums can be used and are kept up to date in all your posts.
User Resources

Icons for topics you've posted to.
Show new replies to your posts.
Ability to view most recent messages.
List all topics that have new replies since your last visit.
See who is browsing the same boards or topics as you.
Topics that span multiple pages have the page numbers listed as well as an "all" link.