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.

AddThis - AddThis free website tools include share buttons, targeting tools and content recommendations help you get more likes, shares and followers and keep them coming back.

Optimizely - A/B testing you'll actually use.

Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.

Dynamic Yield - Personalization & customer experience management

AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.