Mailwasher - Over 8 million people use MailWasher as their spam filter
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
SPAMfighter - SPAMfighter and Microsoft have built the strongest and most effective anti spam filter for Outlook, Windows Live Mail, Outlook Express & Thunderbird
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Spam Reader - Spam Reader is a free anti-spam add-on for Microsoft Outlook.
Marketo - Marketo's powerful marketing automation software helps marketers master the art & science of digital marketing to engage customers and prospects.