PushCrew - Push Notifications for Websites
Invision - Prototyping and collaboration for design teams
OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
iZooto - Engage your mobile and desktop web users with intelligent web push notifications.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.