Voyager for Lemmy (previously wefwef)

Edit: But seriously, FreeFileSync is a godsend. The name is a bit meh, but the program is extremely powerful

QGIS (https://qgis.org/en/site/). A Free and Open Source Geographic Information System. There are also free basemaps available - I use the same basemaps as I use at work in ArcGIS Pro.

If you can’t believe it, you need to learn more about FOSS software. In other words, what you’re describing is PEBCAK.

BOINC. If you’re a scientist, you can use it to distribute massive computational workloads for free. And there are tons of computing volunteers who will gladly do the computation for you. If you love science, it’s a great way to engage with some cutting edge research projects and know that you’re “doing my part!”. You can help research cancer, develop new open source drugs, map the galaxy, or just do some fun math stuff. Just install and pick your projects, no PhD required! There was even a projects for a while to reverse all the minecraft seeds that some people participated in. https://sopuli.xyz/c/boinc

Rclone, Neat Downloader, VLC, FreeCommanderXE, LMMS, any Keepass program, Rufus, Gimp, Notepad++, 7zip, ffmpeg, yt-DLP