Hello,
I have re-activated the site 'sudokugeant' I have created some years ago (see thread "giant sudokus 16x16, 25x25, 36x36 … 100x100")
It contains large sudokus (size up to 100x100), x-sudokus and solvers to download.
Thank you for your feedback on http://sudokugeant.cabanova.com
phil