Rotation Lock + Landscape

Stop screen auto-rotationGPL-2.0-only

Pijaret

Encrypt text by rotationGPL-3.0-only

Mars Live Wallpaper

Rotating red planetGPL-3.0-only

LLCrop (loss less)

Loss Less Cropping and Rotation: Remove unwanted parts of jpg photo without qualGPL-3.0-or-later

Tap 'n' Turn

Confirm before the screen orientation gets appliedGPL-3.0-only

Auto Auto-Rotate

Automatically remembers your auto-rotate setting for every appGPL-3.0-only

Materials Live Wallpaper

A live wallpaper that renders materialsGPL-3.0-only

SSTV Encoder

Image encoder for Slow-Scan Television (SSTV) audio signalsApache-2.0

Port Knocker

Port knocker client; supports one time sequencesMIT

Effects Pro

Apply filters to imagesMIT

3D Model Viewer

Load 3D Models and see how to do itMIT

Sensa Gram

Stream Android sensor data over UDP with minimal latency.GPL-3.0-only

Planetario

Solar System in your PhoneBSD-2-Clause

mTPMS

Read tire pressure sensorGPL-2.0-or-later

QuickTiles

Android Quick Settings TilesGPL-3.0-or-later

SatStat

GPS, sensor and network statusGPL-3.0-or-later

Key Mapper: Unleash your keys!

Remap your volume, assistant button, side key, and keyboard!GPL-3.0-only

Easy Watermark

Securely, easily add a watermark to your sensitive photos.MIT

Automation

Automate stuff on your device by creating rules.GPL-3.0-or-later

Exif Thumbnail Adder

Add thumbnail in the EXIF tag of JPEG picture not having one (batch processing)GPL-3.0-or-later