Pascal similarly lives on with Deplhi/Lazarus. I know plenty of currently supported commercial programs running on Delphi and considering a transition to Lazarus.

I've seen an uptick in APL and APL-derived array languages. "Niche" would have been a better term. I would put Smalltalk in the same category.

What about some commercial languages instead which are de-facto dead, such as ColdFusion, ActionScript, Lingo, and so on...