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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -115,6 +115,13 @@ Configuration is included for:
 * [X11](https://www.x.org/wiki/)---Windowing system with network transparency
   for Unix
 
+There is also some slightly customized support for multi-version environment
+management for three major scripting languages:
+
+* [plenv](https://github.com/tokuhirom/plenv)---Perl
+* [pyenv](https://github.com/pyenv/pyenv)---Python
+* [rbenv](https://github.com/rbenv/rbenv)---Ruby
+
 The configurations for shells, Mutt, tmux, and Vim are the most likely to be of
 interest.  The i3 configuration is limited mainly to changing window switching
 key bindings to match Vim's.  There are a fair few resources defined for