Architect

On http://www.obrazkilogiczne.pl/eindex.php you find every friday 3 new architect (= tents)
puzzles. There are also 2 japanese puzzles (=pic-a-pix) and 3 multidots (=slitherlinks) in
the weekly puzzle mix

Trizm

Trizm is a sudoku variation

You have to fill in the blank small triangles with a 1 - 9

Each number can appear only once in each side, inner triangle, and colored crossbar

You find 5 daily puzzles on http://www.trizmpuzzle.com/

Colour sudoku

In Colour Sudoku, instead of filling in the numbers 1 to 9 in each of the 3 by 3 blocks, you must enter 1 to 9 in the 9 boxes of each colour - i.e. there are nine yellow boxes, and the yellow boxes must contain the digits 1 to 9.

You find a daily puzzle on: http://www.coloursudoku.com/