Landing Pages in MailChimp - Easy to build, custom landing pages for free
GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
Landingfolio - The best landing page designs for your inspiration.
HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Landing Page Checklist - Build your landing page with these 100+ tools
Quokka (formerly Kryptowire) - The gold standard in SAST, MAST, IAST, and more!