Here is a short list of plugins related to protein structure analysis.
xPyder : a PyMOL plugin to analyze coupled residues and their networks in protein structures
https://pubmed.ncbi.nlm.nih.gov/22721491/
Azahar : a PyMOL plugin for construction, visualization and analysis of glycan molecules
https://pubmed.ncbi.nlm.nih.gov/27549814/
bcl::Cluster : A method for clustering biological molecules coupled with visualization in the Pymol Molecular Graphics System (…)
If in doubt, go for Python :-)
There are many ways to compare the "popularity" of programming languages used nowadays. It can be monitored from the demands of companies nearby you, from the relationships you may have access to (aka "the developpers"), or even by following the guidance of (…)