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.
Sortd - Rated the #1 App for Gmail
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
KanbanMail - A Kanban board for your emails.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
LightShot - The fastest way to take a customizable screenshot.