K-9 Mail

Apache-2.0

Guerrilla Mail

Quickly receive anonymous and temporary mails.EUPL-1.2

mail

is a secure and open source e-mail clientApache-2.0

You Have Mail

Email Notification without Google Play ServicesAGPL-3.0-only

K-9 Mail DashClock Extension

Email info on the lockscreenApache-2.0

Voice Mail Player

Play media files through phone's ear-pieceGPL-3.0-only

Tuta Mail

Encrypted email & calendar service - easy to use, secure by design.GPL-3.0-or-later

Delta Chat

Chat over e-mail. Elegantly Retro, Decentralized and Open. Privacy by Design.GPL-3.0-or-later

QuickMSG

Send encrypted instant messages via emailGPL-3.0-only

Infomaniak Mail

The secure messaging service for your emailsGPL-3.0-only

BlitzMail

Share content and notes via emailAGPL-3.0-or-later

SimpleEmail

Simple and minimalistic email appGPL-3.0-only

Email Popup

Display a popup for new mailApache-2.0

FairEmail

Fully featured email client. Neat, intuitive user interface. Privacy friendlyGPL-3.0-only

Inbox Pager

Read and write e-mailsGPL-3.0-only

Proton Pass: Password Manager

Password manager created by the scientists who met at CERN behind Proton Mail.GPL-3.0-or-later

Ltt.rs

Simple and maintainable Android e-mail clientApache-2.0

APG

Encrypt email and filesGPL-3.0-only

Bulkshare 2

Share multiple URLsApache-2.0

Send Reduced

Reduce image sizeApache-2.0