IMHO, Javascript, very reduced but effective! (please note, I don't mean DOM!).

Many people instantly can write JS Code.

Unfortunately JS has some fundamental design flows, hindering to go further towards a all purpose language!

1. "for in" operates on herited properties, without any possibility to add elements to prototypes which are flaged as not enumerable.
2. prototypical inheritance is a very unusual concept (but simple)
3. Packaging is not easy to realise.

IMHO JS will replace VBS and Python as "built in scripting language" for applications.

UPDATE: To avoid misunderstandings, JS is for sure no all-purpose language, but easy for beginners!