Admin Panel for Junior Admins and Mods
Allows you to define restricted access for junior admins and moderators to your admin control panel.

Sudoku
Version of the popular numbers puzzle that can be played on your phpBB.

Social Bookmarking Buttons
Adds in each thread a series of buttons for all of the major social bookmarking sites including Digg, Reddit, Furl and others.

Remove Forum Moderators
Removes the display of forum moderators under each forum on the index.

Admin Notepad
Creates a new page in the admin control panel that contains an admin notepad where an administrator can write things down and save them for later viewing.

Wiki URL Fix
Fixes URLs like http://en.wikipedia.org/wiki/Kim_Possible_(character) which are normally broken by phpBB.

deviantART Profile Hack
Adds a new field to user profiles where users can enter their deviantART profile.

Advanced BBCode Box (IM Portal)
Allows you to more easily add YouTube, Google Videos, etc. to your IM Portal pages. It replaces the default blocks editor with the Advanced BBCode Box.

Auto Group
Allows you to make it so that a user can be added to a group based upon their post count.

Confirmation Topic
This hack blocks the access for defined forums until the user will confirm one special topic.

View Your Own Profile
This hack allows you to view your own profile.

phpBB 2.x Shoutbox
Simple PHP and AJAX shoutbox script that is fully integrated with the phpBB system.

A Quiz
Forum game, in which a user periodically receives a questions and they need to choose the right answer from four variants.

Spaced Categories on Index
Seperates the categories from each other on the index page.

GooglePuller
Creates pages with 100 links to posts on your community with the aim of helping search engines to spider your content.

derefer.me Hack
Makes it so that all user posted external hyperlinks, with or without URL BBcode tags, are through an external link redirection service, in order to mask the referrer.

Battlefield 2 Stats on Profile
Adds an extra profile field to user profiles where users can enter their Battlefield 2 player ID and their stats will then be linked to by an image under their posts.

ReportSystem
Adds a report button on every posting. Reports are viewable by the admin in the ACP and by moderators through the moderator CP.

Assign Posts From One User to Another
Allows the administrator to assign posts from one user to another.

Random or Recent Photo (Photo Album Add-on)
Allows you to display a random or recent photo from the Photo Album Add-on on your forum main page (chosen from a specific category only, if you wish).