I have also used FDM and it seems to be like a copy of Tonec Internet Download manager.Its name Free download manager also somewhat resembles with it.
Apart from all this things it works nice and must be a best free alternative to IDM.
I have also used DAP and Orbit downloader before switching to FDM .Orbit is also a very good free Download manager.
Hey Avinash sir,How about a Giveaway of IDM by you.