The main features of rainers/cv2pdb are: Debuggers and Tracers.
Open-source alternatives to rainers/cv2pdb include: blacksphere/blackmagic. cgdb/cgdb — Console front-end to the GNU debugger. changeofpace/viviennevmm — VivienneVMM. cobaltfusion/debugviewpp — DebugView++, collects, views, filters your application logs, and highlights information that is important to you! cosmos72/gomacro — Interactive Go interpreter and debugger with REPL, Eval, generics and Lisp-like macros. beeware/bugjar.