iLink - iLink enables users to log emails, lookup customers, create new CRM records and run powerful searches all without leaving Gmail.

SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.

MailDrop - maildrop is a Mail delivery agent used by the Courier Mail Server. The maildrop MDA also includes filtering functionality. maildrop receives mail via stdin and delivers in both Maildir and mbox formats.

MailCleaner - Cloud & on-premise anti spam software for businesses

Sanebox - SaneBox is a cloud-based service that allows users to filter and manage their emails.

Vade Secure - Email security to protect against email-borne phishing, spear phishing, malware, and ransomware. Email security and management based on artificial intelligence.