The following technologies feature most strongly in job vacancy advertisements:

Java -- featured in 18% of adverts with an average salary of $100,000 USD
JavaScript -- 17%, $90,000
C# -- 16%, $85,000
C -- 9%, $90,000
C++ -- 9%, $95,000
PHP -- 7%, $75,000
Python -- 5.5%, $100,000
R -- 3%, $95,000
Scheme -- 3%, $65,000
Perl -- 3%, $100,000