I came across this form creation class by chance and thought I would share it with the modx forum. It’s a way to generate html forms and validation logic from existing database tables and even supports multi page forms. I believe it could work well as a snippet if it were adapted to use chunks and placeholders for templating. This would make it easy to create CRUD forms for custom applications in Modx Evo, and would be an alternative to eform2db.
http://formitable.sourceforge.net/