We need a lister for SourceForge, in order to be able to archive what's there.
Sourceforge uses the Apache Allura forge  under the hood to host open source projects.
Unfortunately, the associated REST API does not offer the possibility to list all hosted projects.
A ticket has been created on the subject a couple years ago but no action have been taken so far.
@anlambert has investigated related work, and found various existing scripts that can list the entirety of SourceForge,
via web scarping and have been used to do so in various contexts.
An example is: https://github.com/marcroberts/archiveteam-sourceforge-lister