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.
Barly - A beer expert in your pocket
Sortd - Rated the #1 App for Gmail
PintPass - Get paid to visit breweries and taprooms
KanbanMail - A Kanban board for your emails.
Beer?! - A straightforward app to invite friends for a beer.
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)