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.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Optimizely - A/B testing you'll actually use.
Invision - Prototyping and collaboration for design teams
Dynamic Yield - Personalization & customer experience management
Sketch - Professional digital design for Mac.