Harrison
uddeIM 
uddeIM allows users of your community to send Private Messages to each other (note that uddeIM is not a webmail component nor an email client). uddeIM wants to be simple and easy-to-use but it offers all the features you need in a Private Messaging System ...
Kunena
Kunena - The leading Joomla Forum Component. Downloaded more than 1,850,000 times in 3 years since its start. The only forum/discussion solution for Joomla that is community driven. No hidden fees, no surprises - true open source. See our public forums, G ...
Ban IP Address/Range for 1.5
This simple plugin installs into your 1.5 site to blacklist or whitelist IP addresses and ranges for either the administrator or the site. The settings can be used interchangeably so the administrator can be set to white list mode and the site can be set ...
LastVBF
VBulletin bridge for Joomla Website ...Without any Username or Password for Database ..so your website is Safe!!!!!! See demo first !!!! and now i add some parameters for another language. This Module Display Latest Threads Title of VBulletin Forums. ...