Read and send mail from the Menu Bar (SMTP and IMAP). AlphaMail is a small, lightweight email client that presents your emails in a popover from the menu bar.
App for Gmail
AURA
AURA is a native Gmail app that lives in your menu bar. It has dark mode, powerful fuzzy search, multiple accounts, native notifications, multitouch swipe, Gmail labels, thread counts, important messages and a ton more. Unlike lots of others it isn’t just an Electron or Chrome wrapper around the Gmail website.
Cardhop
iAddressX
iAddressX puts all your Contacts application-related information in the menu bar. It takes the pain out of looking up contact information, searching for a specific contact, or quickly dial a number or send a text.