Key Features:

No user registration needed to post!
Free to post ads
Users may pay to make ads Featured
Users may pay to make ads run longer
Unlimited categories and subcategories
Unlimited regions, cities and areas
Ability to add custom fields for each section
Complete search feature, including custom fields
Event Calendar
Image Submissions
Email verification for ads
Image verification for spam protection
Picture upload with ads
Automatic resizing of photos to reduce dimensions and size
Option for users to report abuse
Automatic expiration of ads after a configurable duration
Specify ad expiration time for each section
Automatic deletion of ads after a configuratble number of abuse reports
Form to email the poster, with attachment, without revealing his email
Block certain attachments, like EXEs
RSS feed of listings with configuration options
Search engine friendly urls for ads (using mod_rewrite)
Language file to change the text used on the site
Setup different featured and extended ad options from the admin
Automated Paypal gateway
Control all aspects of ads from the admin
Block users by IP address
Bad word filter

and many more...!

Configuration Options:

Site language
Initial city to show ads from
Enable/disable event calendar
Enable/disable image submissions
Show/hide left and right sidebars
Sort locations and categories alphabetically
Number of columns for showing categories
Ads/images per page
Show number of ads next to categories
Show number of ads next to subcategories
Number of pictures uploadable per ad
Maximum picture filesize
Allowed picture file types
Width and height of resized pictures and thumbnails
JPEG quality of resized images
Currency symbol to use
Enable/disable image verification
String to replace bad words with
Show/hide latest ads in homepage and number of ads to show
Show/hide category list in the left sidebar
Maximum number of abuse reports needed to automatically delete an ad
File types and maximum size of attachements allowed when contacting posters
Number of ads to include in the RSS feed
Number of characters to show for ad description in the RSS feed
Enable/disable featured ads and extended ads

and many more...!

Minimum Requirements:

PHP 4.3 or later (with safe_mode OFF)
MySQL 3.23.47 or later

Optional Components:.

Apache server with mod_rewrite support
To enable search engine friendly URLs.

GD Library Support for PHP
- To enable security code verification and automatic resizing of images (GD Library comes pre-packed with PHP 4.3. So if you have PHP 4.3, then most of the time you will have GD Library as well.)


Support for cron jobs
- If you want to automatically delete old posts from the database and free up some space