Something like codiad?

somebody know any app to nextcloud like a Codiad App

Which features do you need? I use the Ownpad app (together with my own Etherpad instance) to let multiple people make changes to a document together in real time.

For better or worse, this setup:

  • has plugins for code highlighting and such
  • is by no means an IDE - only an editor
  • stores its ‘pads’ in a database, rather than on-disk

You can also use a locally installed IDE and map its storage to Nextcloud (either synced or via DAV), but it really depends what your use-case is.

You could probably just include Codidad via the external pages app.