https://sourceforge.net/projects/gnuwin32/
Be especially careful with network-facing tools like openssl since the project hasn't been updated in many years.List of packages available:
The following package ports from GnuWin were NOT added to our database and listings:• A2Ps | • Arc | • Arj | • Ascii_Chart | • Attr | • AutoConf | • AutoMake | • Awka | • Barcode | • Bc | • Bison | • Bm2Font | • Bmp2Png | • Btyacc | • Byacc | • Bzip2 | • Calc | • Chsuf | • CompFace | • CoreUtils | • Cpio | • cppi | • Cproto | • Cpuid | • Crafty | • Crypt | • CygUtils | • DeHtml | • DeRoff | • Diction | • DiffUtils | • DmiDecode | • DosChk | • DviDj (DviDjk) | • Ed | • Edll | • Edll-Bfd | • Enscript | • FatAttr | • Fax2Png | • FdLibM | • File | • FileType | • FindUtils | • Flex | • FreeType (the library and the demo programs) | • Gawk | • Gcal | • Gd | • Gdbm | • GenGetopt | • GetText | • GifLib | • Glpk | • GnuChess | • Gperf | • Grap | • Grep | • Gri | • Groff | • Gsar | • Gsl | • Gzip | • Hello | • Help2Man | • Hex2Bin | • HexTools | • Hodie | • Hp2xx | • Id-utils | • ImgToPs2 | • Indent | • JbigKit | • Jpeg (ligjpeg) | • Jpeg2Ps | • Jwhois | • Less | • Lha | • LibArchive | • LibArt_LGPL | • LibConfig | • libgw32c | • LibIconv | • LibIntl | • LibOpennet | • LibPaper | • LibPng | • LibTool | • LibUnGif (see GifLib) | • LibUTF8 | • LibWmf | • LibXmi | • LibXml2 (and LibXml) | • LibXslt | • M4 | • Make | • Mawk | • MiniSed | • miscfiles | • MkTemp | • MsCompress | • Nawk | • Nenscript | • NetPbm | • NtfsProgs | • Palm Pilot Tools (imgvtopnm, pbitmtopbm, ppmtotbmp) | • Patch | • PbmAdd | • PcRe | • PdCurses | • PDFlib-Lite | • PieChart | • PlotUtils
• PngUtils (contains the following packages: bmp2png, gif2png, optipng, png2ico, pngcheck, pngcrush, pnggen, pngmeta, pngquant, pngrewrite, PNGtools, pnmtopng, tiff2png, wbmptopng, VisualPng (a GUI program))
• PolyglotMan (rman) | • Popt | • Psmark | • PsUtils | • Re2C | • Readline | • Regex | • Rpl | • Rx | • RxSpencer | • Scribe2LaTeX (s2latex) | • Sed | • SgiTools (IrisTools) | • Sgrep | • SharUtils | • Src-Highlite | • SunRpc | • T1Lib | • T1Utils | • Tar | • TermCap | • TexInfo | • Tiff (libtiff) | • Tre | • Tree | • Ttf2Pt1 | • Units | • UnRar | • UnRtf | • Unzip | • URT | • Util-Linux-NG | • Which | • Wv | • x86Info | • Xpdf | • Xpm | • Xpm2Wico | • Zimg | • Zip | • Zlib
- OpenSSL (as a port): old insecure version.
- Wget: old insecure version.
- troff: does not contain tools but just documentation for the troff document formatting language.
- gcc-doc, glibc-doc.
- This package linked from their page. Not by the GnuWin team, I think.
- Any library with no executable tools.