Update resources.md

* Windows Tools

2020/2020-02-15_gnuLinuxCourse/resources.md

@@ -44,3 +44,18 @@ their [many excellent learning resources](https://ulhpc-tutorials.readthedocs.io
   A business-friendly take on Free Software. For those interested in historic minutiae, 
   see [OSI vs FSF](https://en.wikipedia.org/wiki/Open_Source_Initiative#Relationship_with_the_free_software_movement).
 
+## Windows Tools Related to Gnu/Linux
+
+* [PuTTY](https://putty.org/)
+  SSH client, agent and GPG generator.
+  
+* [VNC](https://tigervnc.org/)
+  One of many VNC clients.
+  
+* [Cygwin](https://www.cygwin.com/) 
+  A venerable collection of GNU and Open Source tools which provide
+  functionality similar to a Linux distribution on Windows.
+  
+* [MobaXTerm](https://mobaxterm.mobatek.net/) 
+  A more sleek variant of _Cygwin_. Freeware (for personal use), not
+  open source.