Amazon Appstore - The Amazon Appstore is a place to purchase and download apps for your Android device.
iManage Work - iManage Work Product Management helps to organize and track the complete lifecycle of a professional engagement.
GetJar - Discover and play paid apps and games for free.
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
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.
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.