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Features like Scala's implicit parameters could be argued to be a kind of "dynamic scope". True, the language is lexically scoped and most code is written expecting that, but it does allow you to "opt out" of this scoping mechanism and look for values to be specified in the environment.

Perl my/our/local is the most unusual scoping I know of[1]. But still lexical, except maybe local which is more like an alias?

[1] http://www.perlmonks.org/?node_id=66677

my is lexical, our is global, local is dynamic.

I'll premptively add a bit of precision before a pedant comes along: my is lexical all the way; our defines a lexical binding over a global variable, and local defines a dynamic binding (of lexical extent) over a global.

Are you sure the pedant hasn't already arrived? ;-)

The only ones I can think of are Python and Javascript, both were created in the 90's.

Python and JavaScript both have lexical scoping - e.g. http://www.ecma-international.org/ecma-262/5.1/#sec-10.2.

Ah my mistake then, I must be misunderstanding what lexical scoping is.