Logic Masters Deutschland e.V.

Normal Sudoku rules and the marked diagonal contains the digits 1-9 as well.

Thermometer
Along Thermometers digits increase from the bulbs to the tips (r3c6, r5c6, r8c2).

Little Killer
Clues outside the grid show the sum of the digits along the indicated diagonal. Digits can repeat along this diagonal if allowed by the other rules.

Kropki
Cells connected by the black dot contain digits in a 1:2 ratio. Not all possible dots are given.

Links: f-puzzles / ctc-app

Happy Easter :-)