For Taming Email, Calendar, and Contacts: Boxer
(Free; Android)
($4.99; iOS)
Many of us have email accounts all over the place. Boxer is an app that lets you manage email from one interface. It supports email accounts from Gmail, Yahoo, Exchange, iCloud, Office 365, IMAP and POP3. It was a Webby award nominee for Best Mobile Productivity App in 2015. It also integrates with Dropbox, Box, and Evernote.
Boxer will also aggregate your calendars into one “smart calendar†from the above services, as well as your contacts. It’s a great tool for using one app to handle data from multiple sources.