Delta Icon Pack (Links: Official Site, Github, Google Play, IzzyDroid)
Harmonoid Music Player/YTM Streaming (Links: Github) P.S the android version is having a rework at the time of writing this, but should be out maybe in 2-3 months.
FoxyDroid (Links: Github, F-Droid)
Trail Sense (Links: Official Site, Github, F-Droid, Google Play)
Privacy Indicators (Links: Official Site, Google Play, Github, F-Droid)
Radio Garden (Links: Official Site, Google Play)
Compass by R. Apps (Links: Google Play, Galaxy Store)
Black Screen: video screen off (Links: Official Site, Google Play)
FakeStandby (Links: Github, F-Droid)
SystemUI Tuner (Links: Official Site, Google Play)
OLEDBuddy (Links: Google Play)
CamWings: Anti-Camera (Links: Official Site, Google Play)
WTMP {Who Touched My Phone} (Links: Official Site, Google Play)
Animity (Links: Github)
HDO Box (Links: Official Site)
Overdrop - Weather & Widgets (Links Google Play) Due note it has a pro version
Smart Launcher (Links: Official Site, Google Play)