I want to recommend the best equaliser I have seen on Android. The best part of it, that you can create preset for you own headphones based of frequency response graphs. How to do it you can find on Wavelet GitHub.
I had been using Instagram since 2014 and thought I cannot live without it, coz I can miss something about others' lives. And also I liked to share about myself. However I don't use it for six months and even don't regret. In addition I mostly don't use social medias (the exception is Fosstodon, but rarely). So my primary services to be in contact with people are mail (unfortunately Gmail for work purposes) and Telegram (that I appreciate for lots of functions and ads free).
Nextcloud allows you to lock a file to signify you are working on it.
This video introduces the feature and shows how it can be helpful to synchronize work between team members!
Some guy, who is interested in all this stuff.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.