Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Envoy - Visitor registration that's changing how guests are greeted in companies around the world.
Create Issue Branch - Automates the creation of issue branches on GitHub
The Receptionist - The Receptionost is a visitor managemnt solution that has visitor logging system to track visitor traffic.
REVISR - Git Management for WordPress : keep track w/ version control
TractionGuest - Safe, secure workplace for all.