WebCC is a web server suite that essentially allows you to host your Harmony database on the Internet, letting freelancers and off-site contributors work on your production from any location with Internet access. Users can browse your Harmony database using a web browser, download scenes, work on the downloaded scenes locally using their copy of Harmony, then upload their changes back to the database.
Because it is entirely web-based, WebCC users do not need to be directly connected to the Harmony server nor to have a Harmony Server license to use WebCC. All they need is a web browser, as well as a licensed copy of Harmony Stand Alone to work on the scenes they download.
WebCC can however also be used on machines that are connected to the Harmony database server, as a complement to Control Center. In this case, scenes can be opened directly from WebCC in Harmony, without having to download them first.