"Recently" I've created Sven's SudokuPad and the free web app used by Cracking The Cryptic. This page is just a collection of various social links.
The Sudoku web app at app.crackingthecryptic.com was created and is paid for and constantly improved by Sven Neumann. He also publishes the companion mobile/desktop app "Sven's SudokuPad", which helps support the server and development costs of the web app.
You can contact me in various places:
You can find Sven's SudokuPad mobile and desktop app here: