SaaS Email Marketing Handbook - Double Your MRR With Email Marketing
SendOut - Affordable email marketing for bloggers and influencers
HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Mailzak - Give a boost to your #EmailMarketing
Elevatr Email Marketing Automation - Fast and easy email marketing software
Mailblast - Email marketing on a budget using Amazon SES