I'm interested in what applications people use, maybe I can discover some better alternatives.

Music: Spotify for streaming, Dopamine for local music.

Cloud: OneDrive. As a student, I get 1 TB of space for free.

Email: Mailspring, though I'm eyeing eM Client as an alternative right now.

Text Processors: Mostly VS Code with LaTeX, but I do sometimes use good old MS Office.

Code: VS Code again, and also IntelliJ IDEA and CLion for the respective languages. VS Code for anything that isn't C or Java related. I'm also watching the development of Oni Vim 2.

PDF: On my laptop with a touch display, I use Drawboard. On my PC at home I use Nitro PDF.

Browser: Firefox, ever since the quantum update it's nice and snappy. Though maybe I'd switch to Vivaldi when they add Sync at some point.

What are some apps that you use that aren't particularly well known? Let's help each other discover some interesting new tools!

lichess - best chess app out there IMO. Completely free and open source, has daily puzzles, and a pretty active pool of users to play against!
Syncthing - file syncing tool that works with just about any operating system (although I don't think it works with iOS). I use it to take notes and write lyrics/my journal and sync them back to my linux laptop.
Untappd - social media app for tracking craft beers that you drink. I've only just started using it, since I was on holiday and wanted to keep a note of the ales I was drinking. It's a free app, but supported by ads. I believe there's a paid tier, but the free version works well enough, and it's useful for encouraging me and my friends to try new beers when we're out and about.
WK - Japanese flashcard app, which is technically a front-end for the wanikani service. As you learn new radicals, characters, and vocabulary, it serves them back up to you after a certain length of time. If you remember it, it'll wait longer next time, and if you don't get it right, it brings it back to the top of the pile.

My friend was rambling about making his own Stackoverflow/quora clone, but with some random specific features.

Note that this project would probably compete directly with Quora, but have multiple subcomminties like Stackoverflow/Reddit. We think taking programming FAQs from SO is too uphill of a battle to focus on.

What are some great ideas?

My friend and I are considering finishing a prototype of a Reddit app. We've already agreed to the following features on first release (if we keep going).

• Similar urls to current Reddit website (so you can change the URL to reddit.com and see the same page)
• voting, commenting, posting selftexts and links
• Directly uploading image posts may come later if it looks complicated
• Masstagger integrated.
• Dark theme (other options in later releases)
• Primary use case: desktop and mobile web.
• Performance first. Reddit's 1 minute load time on default mobile, missing/broken features on i.reddit.com/.compact, and a few tiny complaints on the desktop site are the primary reasons we are considering writing this app. Native is not in our collective skillsets or radar, so we're going to go the extra mile to make sure the app respects both your time and your battery where possible. We did do some research and found that Reddit has actually been negligent in this regard on mobile web, meanwhile we have years of experience in the subject.
• Mailbox (send/receive messages, orange icon on new message/comment reply/thread reply).
• No infinite scroll
• View source JSON of comments/posts.

What are some features/ideas that members of this community would really like in a Reddit app?

I've been thinking a lot lately about the future of software and where native apps and the web will reconcile and I had the idea that what if "the next OS" had a OSS federated app store that people and organizations could host themselves, but the system still used the app store model that pull app/program listings from all the installations online? This could apply to mobile or desktop computing, or even any of the other platforms (see windows store system compatibility).