A 3D-printed ethernet RJ45 clip to secure/repair/fix broken tab (2020)
Can also just buy a bag of 'em: https://www.techtoolsupply.com/RJ-45-Quick-Plug-Easy-Repair-...I'm still working my way through the 50-count bag I bought in 2018; evidently I don't actually encounter that many broken cables, they just exert an outsized effect on my psyche when I do.