A few of my friends have their own web sites.
Each one is worth a visit:

Dick Gaasbeek (Dutch only)

Olga Gabrielova

David Howe

Rick Meatyard

Anja van der Pol (Dutch only, but with many paintings)

Nick Popov

Curtis Rindlaub

Beatrijs Ritsema (Dutch only)

Dick Teachout

Hans Vandersmissen (Dutch only)

Gerrard Verhage

Frans Verhagen (Dutch only)