* Ad Management
* Affiliate Programs
* Blog
* Bookmark Management
* Calculators...
* Calendars
* Chat Scripts
* Classified Ads
* Click Tracking
* Communication Tools
* Content Management
* Contests and Awards
* Countdowns
* Counters
* Customer Support
* Database Tools
* Date and Time
* Development Tools
* Discussion Boards
* Documents
* E-Commerce
* Education
* Email Systems
* Error Handling
* Exchanges
* FAQ and Knowledgebase
* File Manipulation
* Financial Tools
* Flash and PHP
* Form Processors
* Games and Entertainment
* Graphs and Charts
* Groupware Tools
* Guestbooks
* Healthcare
* Image Galleries
* Image Handling
* Interactive Stories
* Link Checking
* Link Indexing
* Mailing List Managers
* Multimedia
* Music Libraries
* Networking Tools
* News Publishing
* Organizers
* Polls and Voting
* Portal Systems
* Postcards
* Quote Display
* Randomizing
* Redirection
* Reviews and Ratings
* Search Engines
* Security Systems
* Server Management
* Site Mapping
* Site Navigation
* Site Recommendation
* Software Repository
* Tests and Quiz
* Top Sites
* Unsorted
* URL Submitters
* Usenet Gateway
* User Authentication
* User Management
* Vertical Markets
* WAP and WML
* Web Fetching
* Web Hosting Tools
* Web Rings
* Web Search
* Web Traffic Analysis
* XML and PHP