coleifer/flask-peewee - GitHub. Interesting small project that works with Flask and Peewee and makes a somewhat more complete stack for Python web programming out of it. Also provides an admin interface, like Django - for this wtforms is used. Flask itself uses Jinja2 and Werkzeug underneath - this brings in good debugging tools and powerful templating, for example. By the way, PyCharm in the upcoming version 2 will also support Jinja2 at the same level as Django Templates (template debugging with breakpoints and stepping in the template!).