FlashGet comes with a beautiful interface to simultaneously download multiple videos, software, and other files. Feature to download torrent files is also available which makes it actually a better alternative to IDM. All the downloaded files are automatically placed with associated category. So finding a particular file becomes easy. It comes with all the basic features that should be available in an IDM alternative
Another useful Internet Download Manager alternative is ‘uGet‘. It provides a simple interface, but performs the task of downloading multiple files successfully. Left section of its interface will show you all the active downloads, finished, and queued downloads. It monitors Windows clipboard and when you copy a video link or any other file’s link, it automatically prompts you to download that file using this software.
All these are really good download managers and you don’t have to spend a single penny to use them. I have added fully featured and easy to use software in this list that provides straightforward solution to download multiple files together using multiple threads and work as good alternative to Internet Download Manager.