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.

Text Alerts - Mobile Text Alerts allows administrators to send out mass SMS text messages to groups, it is useful way to keep group members informed about quick announcements.

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

JungleBell - JungleBell is a SharePoint alert and reminder tool.

Dynamic Yield - Personalization & customer experience management

DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.