Mine is Local Send which is a FOSS alternative similar to air drop that works across a variety of devices.
Not discovered in the past year, but in the year before that:
Blender (program for 3D modelling, animation and rendering)
cobalt.tools(web-app for downloading video or audio content from youtube and other websites)
VLC (media player that plays almost everything)
Warning, I might be wrong:
yt-dlp seems to be operated with command lines, whereas cobalt is a user interface in an opened browser tab. You paste the link of the desired video or audio source into a search bar and you can toggle different settings (bitrate, file format, video output size etc.). The desired file will be appearing as a download into your download folder.
I discovered that VLC isn’t so good at playing .flv files. This are video files that are saved in the Adobe Flash Video container format. I have some episodes from cartoon series which I downloaded years ago. Sometimes there are no playback issues with VLC, but sometimes the audio track is delayed. For this reason I have installed IINA, but I like VLC’s user interface better.
Weirdly enough I often find things playing back better in IINA than VLC even though as I understand it they’re basically the same under the hood. I also find the reverse occasionally as well.
It can’t go back one frame at a time yet has no problem going forward at the same pace.
Pathetic.
Are there any FOSS apps that can do this? MPV can move frame by frame but moving back is so unusably slow.