Description: GeoCha is a web-based geographic annotation tool that allows users to view satellite imagery and annotate locations with tags, comments, pictures, and drawings. It facilitates crowdsourced mapping.
Type: software
Description: Gowalla was a location-based social networking website and mobile app launched in 2007. It allowed users to check-in at various locations and connect with friends to share places they have visited. The service shut down in 2012 after being acquired by Facebook.
Type: software