WikiPro - All-in-one Business to Customer Communication
Toolset.com - The complete and reliable plugin for managing content types in WordPress.
Heymarket - The professional way to text message. Your customers are mobile. Heymarket helps you manage those relationships from your smartphone.
Hypefury - No idea what to share on Twitter?
Text Groove - Text enable your existing business landline, VoIP, or toll free phone number and connect with your customers in a whole new way. Try Text Groove for free.
What to Tweet - Never again run out of Tweet ideas.