MegaDownloader is a download client for MEGA.CO.NZ, allowing you to easily download files from MEGA.CO.NZ. It is a standalone unofficial application. It's free and there is no charge for using it or download it. The app allows you to download multiple files simultaneously with multiple connections per file, squeezing the bandwidth. It takes up less than 2MB and consumes little resources.
MegaDownloader does not show ads or banners when using it. It doesn't collect information from user. It only connects to MEGA.CO.NZ to download the files, and periodically checks for updates. Nothing else. And sensitive internal information is stored locally encrypted using DPAPI and AES.