Open Forms provides templating solutions for form-designers (see manual_templates), built on top of the Django Template Language.
Templating functionality is gradually becoming public API for other apps/packages.
Module: openforms.template
openforms.template
openforms.template.sandbox_backend
openforms.template.openforms_backend
openforms.template.validators
openforms.template.backends.sandboxed_django.SandboxedDjangoTemplates