Personally I like Wikipedia as a first pass. Search Wikipedia for "visa requirements for Australians"[1] or "visa requirements for Indians"[2] or whatever your nationality to see very comprehensive info without any ads or animations or fluff. Then before I book travel, I'll go to the actual consulate or embassy website.
Wikipedia is trustworthy, organized, and detailed. However, the consulate or embassy website is the only authoritative source. Every other "visa info" site on the web leaves me nervous.
[1] https://en.wikipedia.org/wiki/Visa_requirements_for_Australi...
[2] https://en.wikipedia.org/wiki/Visa_requirements_for_Indian_c...