For search engines, this is an interesting list: A look at search engines with their own indexes. It doesn't cover every possible Bing frontend, but it gives you some idea of where else to try if your default search engine gives you nothing.
As for web browsers, a short practical list broken down by rendering engine looks like this:
- Webkit-based: Safari
- Blink-based: Chrome, Chromium, Edge, Vivaldi, Brave, Opera
- Gecko-based: Firefox, LibreWolf, Tor Browser
- Goanna-based: Pale Moon
Those are all under active development.