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@@ -135,8 +135,11 @@ familiar with one of them, it's not difficult to move between it and the
 other.
 
 [[How to get the programming languages running on your computer]]
+
+[[Using the programming languages]]
+
 	
-## Recommended Readings ##
+## Recommended Books ##
 
 *	*An Introduction to Lambda Calculi for Computer Scientists*, by Chris
 Hankin, currently $17 on
@@ -168,6 +171,10 @@ This covers some of the same introductory ground as The Little Schemer, but
 this time in ML. The dialect of ML used is SML, not OCaml, but there are only
 superficial syntactic differences between these languages.
 
+# Other resources #
+
+* [Barker's Lambda Tutorial](http://homepages.nyu.edu/~cb125/Lambda): tutorial with embedded Javascript code that enables a user to type a lambda form into a web browser page and click to execute (reduce) it.
+* [Penn Lambda Calculator](http://www.ling.upenn.edu/lambda/): requires installing Java, but provides a number of tools for evaluating lambda expressions and other linguistic forms.
 
 ##[[Schedule of Topics]]##