There is a very nice website by Mark cadar "drawmixpaint" for oil painting, click here to open the website.

Some commercial websites, I really like very much , are fineartamerica and mojarto, which I use sometime to get an idea.

There is a very nice blog by the Nobel laureate in physics Gerard t'Hooft  How to become a GOOD Theoretical Physicist

Second in my list is a website/blog by a theoretical physicist Sean carroll preposterousuniverse

For a more broad areas physicsworld