Stiki - Employee onboarding made simple
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
Carrd - Simple, responsive one-page site creator.
User Onboarding - Onboarding teardowns of popular sites/services
Onboarding by HCM Deck - Automate the employee onboarding process
UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.