Amazon Appstore - The Amazon Appstore is a place to purchase and download apps for your Android device.
OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
GetJar - Discover and play paid apps and games for free.
OptiMonk - OptiMonk is the most powerful Onsite Retargeting platform, that helps you increase the conversion rate of your site, and get more leads by recovering lost visitors.
F-Droid - F-Droid is an interesting alternative for Android users who want to try something different and not have to use the Goole Play store all the time.
POPUPSMART - A no-code tool to increase e-commerce sales, build email lists and engage with your visitors in just 5-minutes.