It's really one for power users, with support for over 300 decryption plugins, automatic RAR extraction, password list searching and OCR to complete some of the captcha 'I'm not a robot' checks you encounter on download sites. JDownloader is a free, open source download manager with a massive developer community, and it's available for Windows, Linux and Mac.
Read our full Ninja Download Manager review. Note that the link to download the free version of Ninja Download Manager is at the very bottom of the developer's homepage.
There are lots of fantastic options around, but if you love music, films and TV then Ninja Download Manager is the tool for you. There's also a built-in video downloader with support for YouTube and Vimeo, and a video converter that changes the file format automatically once it's finished downloading. If you're into music and movies you'll be delighted by its sequential setting, which lets you begin playing a file while it's still downloading. It does this by splitting each file into chunks, then downloading each one using a different server connection, making downloads not only faster, but also more reliable. Its interface is simple and modern (if a little dark), and its accelerator can help you get your files 10 times faster. Ninja Download Manager is a relative newcomer to the downloading party, and it looks considerably more contemporary than its, er, contemporaries.