Board Thread:Support Requests - Getting Technical/@comment-5716479-20130612215418/@comment-452-20130612235137

Yes.

Extension:StringFunctions, this extension is integrated into Extension:ParserFunctions, so StringFunctions isn't mentioned on Special:Version, but ParserFunctions is.

Check out the StringFunctions page, but for example:
 * shows:


 * shows:

edit: on Special:Version, at the bottom under the section "Parser function hooks", you can see each of the string functions listed.