HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Poll the People - Poll the People is a leader in pre-live A/B testing.
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!
CubeGO - Scale your qualitative user testing, quickly and easily.
Quokka (formerly Kryptowire) - The gold standard in SAST, MAST, IAST, and more!
Userbrain - Easy, fast, and affordable user testing for websites and prototypes.