OpenStax
Open Stax: Catherine Schmidt Jones: Modes and Ragas: More Than Just a Scale
Discussed on this web page are examples of several modes and ragas. You will learn modes ranging from the classical Greek modes to the Indian ragas.
OpenStax
Open Stax: Catherine Schmidt Jones: Scales That Aren't Major or Minor
As the title suggests, this site defines and gives examples of various other types of scales including chromatic, whole tone, blues scales and more.