SaaS Email Marketing Handbook - Double Your MRR With Email Marketing
Olyo - Direct marketing via Facebook Messenger
HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Epichat for Messenger - Raise your social media marketing to the next level
Elevatr Email Marketing Automation - Fast and easy email marketing software
MFY.im - Facebook Messenger sequences and growth widgets for creators