I made / had to make this simple Tic Tac Toe the other day, and I used jQuery and js for the initial version.
Afterwards I couldn't help myself and recreate it using elm, so here we go :)

Possible Improvements:

• add missing vertical win conditions
• prettier win screen
• add draw screen
• code should become a little prettier, especially the view
• implement AI (with respect to Asimovs rules of course)

To deploy: npm start