Envoy - Visitor registration that's changing how guests are greeted in companies around the world.
Akka - Build powerful reactive, concurrent, and distributed applications in Java and Scala
Teamgo - Create a safer workplace for your visitors and employees. Teamgo visitor management captures sign-ins, prints badges, sends arrival notifications and emergency alerts.
Dapr - Application and Data, Build, Test, Deploy, and Microservices Tools
BreezN - Visitor management for hospitals & healthcare facilities
Finagle - Finagle is a protocol-agnostic RPC system.