Here are some scripts and codes which may be useful. Feel free to use, some of them are not mine, credit goes to the relevant author.
analy_gofr.tcl — Separate RDF plots each type of bead in a simulation trajectory
analy_shape.tcl — analyse shape (Rg, asphericity, acylindrity, shape anisotropy) for a polymer solute [requires GyrTensor package]
pepgen.tcl — simple psfgen script for VMD