CleanTalk - Spam protection plugins for Joomla, WordPress, phpBB3, IP.Board, vBulletin and etc.
Re:scam - I’m an AI chatbot created to send scammers a message.
Akismet - Akismet is a spam fighting service that protects millions of WordPress sites from comment and contact form spam.
Compatipal - Find like-minded people nearby.
StopForumSpam - StopForumSpam - a database of known forum and blog spam, its sources and the email addresses reported
Referrer Spam Remover - Remove spam bots from your Google Analytics data