Sortd - Rated the #1 App for Gmail
KanbanMail - A Kanban board for your emails.
Asana for Gmail - Turn emails into tasks without leaving your Gmail inbox
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
Kiwi for Gmail - Dedicated Gmail client with clean integration of Google Calendar, Contacts, Google Drive, and...
Chrome Extension Manager by cloudHQ - Declutter your Chrome extensions and manage them with ease