aria2 is a download utility with resuming and segmented downloading.
Using the makefile aria2.mak, I successfully ported aria2 to Windows using the Debian MinGW cross-compiler. While aria2 compiles under native MinGW and Cygwin, the resultant executable was buggy using the supplied gcc version 3.4.5, and numerous unit tests fail.
After installing gcc 4.3.0 in MinGW using get_mingw.cmd and am now able to produce working binaries in my Windows environment. This leads me to believe that gcc 3.4.5 is not reliable under MinGW.
The latest MinGW binary, and source code is available at https://sourceforge.net/projects/aria2/files/.