MySQL database access wrapper
  Keep track of application errors and warnings
  Template engine that replaces marks with variables
  Get download URL of video files of megavideo.com
  Manage configuration options in the PHP.ini file
  Get details about domains or addresses with Whois
  Generate short URLs using the bit.ly site
   Generate data structures in JSON for JIT
  Send HTTP requests using the Curl library
  Compute checksums of values passed by link URLs
 
