WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
BrandVerity - BrandVerity provides brand protection and monitoring tools for paid search, marketing compliance, and brand compliance.
MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...
Wiser - Share relevant content w/in your organization.
Sigstr - Email signature marketing
Mapp Trap - Monitor, Identify and Enforce your map policy with one, easy-to-use, online tool.