RemoteTeam - Remoteteam.com helps remote teams become great places to work with the fully-integrated platform to automates payments and HR tasks.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Swipes - Plan projects, take action and discuss.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
ApproveIt for Slack - Get approvals in minutes, not days. Right from Slack!
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.