Directory Opus. I'm not affiliated, but I'm such a fanboy, I just as well might be https://www.gpsoft.com.au/ My favorite piece of software hands down, it just keeps getting better, since the early 90s on the Amiga.
For photos I still use Bibble, which no longer exists (it's now Corel AfterShot Pro, no idea how good that is). But I love it, both on Windows and Linux. For example, you can set up hotkeys to run scripts on images, to I have one to output TIFF, resize, sharpen and save to .png with ImageMagick, then compress that to jpeg with guetzli. Perfect for me, I miss nothing.
UltraEdit https://www.ultraedit.com/ for coding because has so many options, and SublimeText for coding and note taking (I love that you can just close it with open, unsaved files, and get them back, apart from that it starts instantly)
Instead of the Windows start menu I use http://www.freelaunchbar.com/ for stuff I use often (unless it works on files, then it's a custom button in Directory Opus)
I don't use it often anymore, but this thing is hilarious to make, say, silly skits: http://www.livelooping.org/tools/software/ambiloop/ Set the length to 20 secs or something, start, say something silly, be quiet for 20 seconds, reply to what you just said, what 20 secs again, reply to the reply... the stupidity just writes itself! I bet it can also be used for good, but either way, I love this software, it sparks joy for me for sure.
DCSS is a game I am always interested in checking out again after a while, I love how they constantly change things in their quest to get rid of tedium an favor of interesting decisions: https://crawl.develz.org/
I'm sure there's many I forgot, I'll post an update when I have some more.
Haven't used it in ages, but it always was great for ripping audio CD's: http://exactaudiocopy.de/ Maybe there's something better by now, I honestly have no idea. For the sake of audio preservation, chime in if you know something more accurate, or that works better with modern hardware or what have you :)