CCleaner a freeware system optimization, privacy and cleaning tool for your computer.
A lightweight solutions for your computer antivirus.
Internet Download Manager gives you the tools to download many types of files from the Internet and organize them as you see fit. You can categorize each file as you download it, and then access all downloads right from the app's main interface.
TeamViewer is not only a remote desktop control program, it also has an excellent file transfer function like FTP, and it is very ease to use and much simpler.