Finally PDR has a Nintendo DS section! It should be the most complete source of NDS techdemos so far. The files in detail:

Cube by Dovoto, Draw by David Rorex, Dual Screen Demo (aka 2D) by Dovoto, First by Dovoto, Lights by Dovoto, Ship by Dovoto, Sman by Wriggler, Smantouch by Wriggler, Test 1 by David Rorex, Textured Cube by Dovoto, Triangle by Dovoto, Water Drops r2 by David Rorex, Minesweeper by David Rorex, Nibbles DS by Christian Auby, Pong DS by RiZeUp, Tetris DS by Christian Auby