A bunch! First I used Affinity Designer to work on the more complex icons, then I have another SVG editor called Boxy I use for smaller edits because it doesn’t mess with metadata. Then I used many terminal commands to mass edit the files, such as applying a colour fill or the accent fill. I’ve got another app that optimized the SVG files into similar structures to also help with the terminal commands. Also I found this cool app on my Mac that lets me export an entire font as individual SVG files, so it let me add the whole Google Noto emoji library as proper glyphs that work with my theme. I also ran some command on the emojis to rename them to their proper emoji names from their Unicode ID. I also used a spreadsheet to sort out my commands and colours.

So plenty of apps! 😅