The current version of the tools is at http://www.murdoch-sutherland.com/Rtools/. Only some components compiled by BDR are hosted here.

The Rtools.exe installer contains R_Tcl_8-5-6.zip and iconv.dll compiled by mingw or Visual C++ (sources libiconv-1.12.tar.gz).

R >= 2.9.0 needs a DLL named Riconv.dll to avoid name clashes. That made from the R sources should be fine for almost everyone, but here is one compiled from libiconv by mingw (sources libiconv-1.12.tar.gz).

The procedures and scripts used to compile the Tcl directory and in particular to produce the help file are at https://svn.r-project.org/R-packages/trunk/R-Tcl-win/. The sources used were tcl8.5.6-src.tar.gz, tk8.5.6-src.tar.gz, BWidget-1.8.0.tar.bz2 and Tktable2.9.tar.gz.

Directory goodies contains various tools/libraries compiled up with MinGW, and their sources.