Unfortunately IDM is only available on Windows platform.
But there are almost good alternatives.
b) DownThemAll (firefox plugin)
FatRat is a feature rich download manager written in C++ and built on top of Qt4 library. It supports a lot of download and file exchange protocols and is continuously extended. It also includes a plugin system. Most relevant features are:
- HTTP(S)/FTP downloads
- FTP uploads
- RSS feed support + special functions for TV shows and podcasts
- BitTorrent support (including torrent creating, DHT, UPnP, encryption etc.)
- Torrent search
- Support for SOCKS5 and HTTP proxies
- RapidShare.com FREE downloads
- RapidShare.com uploads
- RapidShare.com link verification and folder extraction
- RapidSafe link decoding
- MD4/MD5/SHA1 hash computing
- Remote control via Jabber
- Remote control via a web interface
- YouTube video downloading
DownThemAll is all you can desire from a download manager: it features an advanced accelerator that increases speed up to 4x and it allows you to pause and resume downloads at any time.
DownThemAll is fast, reliable and easy-to-use! It lets you download all the links or images contained in a webpage and much more: you can refine your downloads by fully customizable criteria to get only what you really want! Be in full control over your downloads, dedicated speed and number of parallel connections at any time. Use Metalinks or add mirrors manually to download a file from different servers at the same time.
DownThemAll is open-source and freeware. No Adware, no Spyware, no hidden costs!