TUI console dec/hex/binary converter tool
Really simple curses-based tool which I've been kinda-missing for years:
There's probably something similar built into any decent reverse-engineering suite or hex editor (though ghex doesn't have one!), but don't use either much, don't want to start either to quickly check mental math, and bet GUI conventions will work against how this should work ideally.
Converts between dec/hex/binary and helps to visualize all three at the same time, as well as how flipping bits or digits affects them all.
Can be found in the usual mk-fg/fgtk dump on github:
(README blurb - https://github.com/mk-fg/fgtk/#tui-binary-conv )