For me, it was perhaps simple-scan, a very simple and efficient GUI to scan documents. I used it with my Brother printer / scanner and it works like a charm. Especially since I do not scan stuff often, so a program with more complex UI would have the effect that I forget how to use it until the next time.
I have been experimenting with Reaper a bit, but I am a sort of DAW noob, so it’s kind of hard to get in to. I’ve done a tiny bit using Lmms though, but I am missing synthesizer stuff in Reaper. I’ve tried installing plugins by putting them into the proper folders and let Reaper attempt to resolve it, but it doesn’t really work as expected.
Any tips? Especially for Linux of course. Many of the tutorials are Windows oriented.
There is a free VST (or clap, etc) synth called TAL Noise Maker (I think) that has Linux support. Good for getting started. Then there is the LSP plugging suite, which is designed for Linux. Lastly, airwindows is native to Linux as well, and is literally one of the best — and 100% free! — plugin suites ever. All of there can be moved (just copy paste) in ~/.vst, ~/.vst3, or ~/.clap.
Links (FYI, clap is always easier than VST, so prefer it; you may have to enable it in settings or something though):
You can of course also use external stuff like Pure Data and Orca through MIDI, OSC, UDP, or even loopback.
Reaper is like the Arch Linux of DAWs. It’s power is in its flexibility and customization. That said, I found it to be uninspiring in its complexity out of the box. That said, the Reaper community is amazing. If you want to mod and customize it into your ideal DAW,y recommendation is to hit the community forums, Discord, etc.
Personally, I bounced from Reaper almost instantly in favor of Bitwig and Renoise on Linux.
I would start from the docs. There is pretty good reaper manual available from its homepage, covers everything from basic “how does one creates the prohect?” to relatively advanced topics.
Most of the plugins I encountered have no native Linux version, but yabridge deals with most of them quite good. I personaly use it paired with Play on Linux to logically separate different groups of plugins and everything works like a charm.