Droid-ify

Minimalist F-Droid client with performance enhancements

XDA Labs

The XDA-developers app store

Wandoujia

Chinese app store

Dream Apps Market

Store that selects the most popular applications from Google Play

Yalp Store

Download apps from Google Play in APK format

4399 GameBox

4399 is a store from which we can download thousands of games for Android

Waptrick

Access one of the most popular online resource repositories

Amazon Appstore

Amazon's Android app store

PlayStation Mobile

The online PlayStation store

/r/Android App store

App store for Android based on a reddit thread

Update Play Store Info

App for manually updating Google Play

Tencent My App

Tencent's apps store

Apptoko

An app store focused on the Indonesian audience

Anzhi Market

Alternative to the Google Play Store

Unlinked

Create your own library of apps, videos, and photos

APKUpdater

Find updated versions for your apps

Mobileuncle MTK Tools

Toolbox for MTK smartphones

Swapper & Tools

Get full Android control with these tools

L Speed

Save battery on your device whilst you're playing

Nova Cleaner

Optimizes the performance of Android

CCleaner

Android version of the most famous cleaner

GLTools

Optimze the graphical performance of your GPU

SD Maid

An app to thoroughly clean your phone

Clean Master

Cleaner, optimizer and antivirus in one

Booster Master

Exploit the maximum potential of your Android

Greenify

Improve the performance of your Android

GearUP

A feature-packed accelerator for mobile games

One Booster

Optimize your Android's performance

Glary Utilities

Optimization app for Android

Package Disabler

Uninstall pre-installed apps

Avast Cleanup

Clean your smartphone and optimize how it works