GDB
Software / App
A command-line debugger on Linux/Unix platforms, which Carmack notes is often only used by programmers at their wits' end due to its unfriendly interface.
Mentioned in 3 videos
Videos Mentioning GDB

George Hotz: Comma.ai, OpenPilot, and Autonomous Vehicles | Lex Fridman Podcast #31
Lex Fridman
A traditional debugger mentioned by George Hotz to highlight the advanced capabilities of Kira, such as rewinding and direct variable tracking.

John Carmack: Doom, Quake, VR, AGI, Programming, Video Games, and Rockets | Lex Fridman Podcast #309
Lex Fridman
A command-line debugger on Linux/Unix platforms, which Carmack notes is often only used by programmers at their wits' end due to its unfriendly interface.

Patrick Collison — CEO of Stripe | The Tim Ferriss Show (Podcast)
Tim Ferriss
A debugger for the GNU system that a Stripe employee wrote a blog post about, helping generate early interest in the company.