http://ck.kolivas.org/Japanese/kanji.html
Is there such a thing for Chinese hanzi? Or at least one html page with hanzi sorted by radicals?

I don't know exactly what you're looking for, but the Pleco dictionary app for android and iOS provides a great deal of information for each hanzi, such as stroke order, radicals and all the words containing the hanzi.

Thanks.
What I'm looking for is ONE html page with as many hanzi as possible sorted by (classical) radicals. Sorting by frequency and components would be a bonus.

[ファブリス]

Potentially useful:

UNIHAN Database
http://www.unicode.org/charts/unihangridindex.html

Frequency and Stroke Counts of Chinese Characters
http://technology.chtsai.org/charfreq/

Modern Chinese Frequent Use Character Chart 现代汉语常用字表
Two sections: 常用汉字 (Frequently Used Characters － 2500) and 次常用汉字 (Less Frequently Used Characters - 1000)
http://www.hrexam.com/common.htm