Flow-e is a visualization layer on top of your Gmail or Outlook inbox. It provides an elegant Kanban-like workflow that's combined with the ideas behind Inbox Zero and GTD. Flow-e eliminates the need of external task management tools and transforms your inbox into a central To Do app.
KanbanMail - A Kanban board for your emails.
WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
Sortd - Rated the #1 App for Gmail
MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
Sigstr - Email signature marketing