Dayon! allows watching and controlling remote computers. It can be used as free alternative to various commercial remote desktop and remote assistance products. Its key features are - no router or network configuration required on the assisted side - friendly, multilingual (de/en/es/fr/it/ru/tr) user interface - assistant and assisted functionality in one packet - secure, encrypted communication (TLS) - very low bandwidth usage - cross platform (Windows, Linux, macOS) - open source - free