Specifically things that improve the ergonomics of working with nodes. Similar to blenders node wrangler, or the features found in bespokesynth.
Are there Quality of life GUI extensions out there?
For synths/loopers etc. Automatism.
If you want to do similar stuff in a DAW https://forum.puredata.info/topic/9884/camomile-an-audio-plugin-that-loads-pure-data-patches/54
For audio analysis https://forum.pdpatchrepo.info/topic/12334/audiolab-is-now-available-on-deken
For logic https://forum.pdpatchrepo.info/topic/12542/blurpd-digital-logic-framework-system-for-pure-data-v3
...... and probably lots more.....