This is a simple Sudoku solver written with React using a naive backtracking algorithm.
The app displays a 9x9 grid and initially fills it with 0s. Simply fill in any of the spaces you know with the numbers 1-9 and click on the Solve Puzzle button. The app when then display one possible solution to the puzzle.
Check out the demo here
Feel free to issue pull requests, fork, report issues, etc. -Adam