7f2b62a70d0544af28cca22d3a7028dc164ec2c1
max
  Wed Feb 5 07:56:35 2020 -0800
documenting third part tools that use UCSC file formats or servers, refs #24666

diff --git src/hg/htdocs/util.html src/hg/htdocs/util.html
index ee7e062..eb1a0cf 100755
--- src/hg/htdocs/util.html
+++ src/hg/htdocs/util.html
@@ -21,16 +21,41 @@
   Offers several configuration options for the output format, including translated protein.</li>
   <li>
   <strong><a href="http://users.soe.ucsc.edu/~kent/protDust/protDust.html">Protein 
   Duster</a></strong> -  removes formatting characters and other non-sequence-related characters 
   from an input sequence. Offers several configuration options for the output format.</li>
   <li>
   <strong><a href="cgi-bin/phyloPng">Phylogenetic Tree PNG Maker</a></strong> - creates a PNG image 
   from the phylogenetic tree specification given. Offers several configuration options for branch 
   lengths, normalized lengths, branch labels, legend etc.</li>
   <li>
   <strong><a href="http://hgdownload.soe.ucsc.edu/downloads.html#source_downloads">Executable and 
   Source Code Downloads</a></strong> - executable and source code downloads of the Genome Browser, 
   Blat and liftOver.</li>
 </ul>
 
+The following tools and utilities created by outside groups may be helpful when working with our
+file formats and the genome annotation databases that we provide:
+public use:</p>
+<ul class="gbsNoBullet">
+  <li>
+  <strong><a href="https://bioconductor.org/packages/release/bioc/html/rtracklayer.html">RTracklayer</a></strong> - 
+  R package to import genome annotations from our databases</li>
+  <li><strong><a href="https://pypi.org/project/twobitreader/">twobitreader</a></strong> - Python package to open
+      2bit genome sequence files</li>
+  <li><strong><a href="https://pypi.org/project/cruzdb/">CruzDb</a></strong> - 
+      Python package to load genome annotations from our servers</li>
+  <li><strong><a href="https://pypi.org/project/ucsc-genomes-downloader/">ucsc-genomes-download</a></strong> - 
+      Python package to download genome sequences from our servers
+  </li>
+  <li><strong><a href="https://daler.github.io/trackhub/">trackhub</a></strong> - 
+      Python package to manage files in our trackDb format
+  </li>
+  <li><strong><a href="https://github.com/Ensembl/WiggleTools">WiggleTools</a></strong> - 
+      C++ Unix command-line tool to work with bigWig files: combine, merge, scale, aggregate and many other operations.
+  </li>
+  <li><strong><a href="https://github.com/dpryan79/libBigWig">libBigWig</a></strong> - 
+      A C library to read bigWig files, without a dependency on our source code
+  </li>
+  <li><strong><a href=""></a></strong> - 
+  </li>
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