Mulch
This is a security-oriented web browser based on Chromium. Many unwelcome features have been disabled and removed, and a few security features have been enabled, thanks to patches from the Vanadium project. The source code repository also includes pre-builds and makefiles for other operating systems to use Mulch as a system WebView.

Cromite
Cromite is a Chromium modification based on Bromite that supports ad blocking and privacy protection.

K-9 Mail
A full-featured email client

Orbot: Tor for Android
Orbot is a free proxy application that makes it safer for other applications to use the Internet. Orbot encrypts your Internet traffic using Tor, which hides the traffic by "bouncing" between a series of computers around the world. Tor is free software, and it represents an open network, which can help you protect against threats to personal freedom and privacy, confidential business activities and business relationships, and network surveillance in the form of so-called traffic analysis.

Termux
Terminal emulator with packages

Aurora Store
Unofficial FOSS client for Google Play with elegant design and privacy

NewPipe
Lightweight YouTube frontend

Barcode Scanner
An open source application that allows you to read and generate barcodes.

Binary Eye
A barcode scanner