Logic Masters Deutschland e.V.

Rules

Normal sudoku rules apply.
Digits separated by a white dot are consecutive.
Digits in a white circle must appear at least once in the four surrounding cells.
Purple dots are pivot points for any clues touching their cell, which are rotated clockwise around their pivot point through N steps of 90 degrees, where N is the value on the pivot.
Rotated clues may overlap but must not extend outside the grid.

Links (all have solution check)
Solve online
PuzzleTV interface note: You can use the rotation buttons below the number pad to rotate currently highlighted pivots, and the software will automatically orient the pivot when a digit is placed on it.

I don't recommend it, but, if you really want to solve this in other software you can do that here, just be aware that the clues won't rotate!
F-Puzzles / SudokuPad