title: which Forms libaray to use with Flask and SQLAlchemy
body: <p>I am working on a web app based on Flask and SQLAlchemy. Most of forms/models are related and therefore need to use a library that's flexible enough to handle multiple forms and allows easy overriding [or creation] of default widgets.</p>
  
  <p>Can someone recommend a good forms library (other than formalchemy). I really liked django forms but wondering if there's an alternative.</p>