Hi The Great Apps, I would like to suggest you trying out our application Actisto.com, which was developed by our team. Here are main features: It is free web application for free online calling, files & screen sharing; It does not require any registration, or installation, you need only internet connection and web browser, which supports WebRTC technology (we suggest Chrome); Secured transfer of data via SSL encryption; We offer option to build-in Actisto icon (widget) into any website for faster connection.