Freebyte Backup is a freeware backup program for Windows. It allows one to easily copy (and filter) a large number of files and directories from various sources into one backup directory. It is possible to backup all files found in the specified set of input directories, or to have only certain file types copied. Files can be filtered according to file-extensions. E.g. you can specify that you want to backup all .doc, .rtf, .jpg, .bmp files, but none of the .exe, .dll and .txt files. You can also very easily define new file extensions inside the filter.