scr.im - Don't share your email on public sites.
HubSpot CRM - Free CRM software for small businesses.
Spamty - Spamty is a web service to encrypt an email address and share it on the internet.
Keap - Grow Sales. Save Time. Get Organized.
Humans Not Invited - CAPTCHA that filters out humans and only lets programs pass
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.