- Open Source apps(FOSS)
Say bye to tracking and Phoning home apps. Open Source apps(FOSS) are developed by communities from around the world which you can download and use just like downloading from Google Playstore.
Open Source apps are also known as Free and open source(FOSS)
You must download these apps from the trusted sites like F-droid. You will find hundreds of fake/pirated apps with similar names in Google search.
The good thing about Open Source apps are codes. Anyone can go through the code for a particular app he/she want to download and make sure that app is clean and do not have any malicious coding.

Here I have listed the most used/trusted open source apps for Android and guide to download them.
Facebook: Frost for Facebook / Slimsocial
Twitter: Twidere / Slimsocial
Youtube: NewPipe
File manager: Amaze / Dir
Map: MAPS.ME
Media player: VLC
Barcode and QR Code reader: Barcode Scanner
E-book reader: FBReader
Password Manager: KeePassDroid /Password manager
Browser : Firefox / Brave /Chromium
Rintone Maker: Ringdroid
Music Player : Phonograph, Vanilla Music player
Cleaning Tool: SD Maid
E-mail: K9 Mail/K9 Mail Material
Calculator: NCalc+
Keyboard: AnySoftKeyboard
Screen Filter: Red Moon(Some OEM’s already have filters)
System Storage Usage: DiskUsage
Messaging: Signal /Telegram
Gallery: Camera Roll
Games: 2048 /OpenArena / Battle for Wesnoth / Warmux
Ad Blocker: AdAway(For rooted phones) | DNS66(Non-rooted phones)
More apps and Categories will be updated….. So keep coming back