These are binaries required for Windows, not necessary on other systems.

Most of these are from http://gnuwin32.sourceforge.net/, namely these packages:

bsdtar-1.2.38-bin.zip
bzip2-1.0.3-1-bin.zip
cygutils-1.2.9-bin.zip [just unix2dos.exe]
libarchive-1.2.38-bin.zip
libiconv-1.9.2-1-bin.zip
libintl-0.11.5-2-bin.zip
libintl-0.14.4-bin.zip
openssl-0.9.7c-bin.zip
patch-2.5.9-6-bin.zip
popt-1.8-1-bin.zip
zlib-1.2.3-bin.zip


The sources are available from the same site.


Also included is curl.exe and its dependencies, from:

http://curl.haxx.se/download/curl-7.16.0-win32-ssl.zip


Also included is svn.exe and dependencies, from:

http://subversion.tigris.org/downloads/svn-win32-1.4.0.zip