- Firefox with uBlock origin (a must for browsing the web)
- Bitwarden (for passwords)
- FX file manager (fast and powerful file manager)
Honorable mention to Music speed changer (uses an advanced algorithm to change the pitch and speed of locally stored audio with minimal distortion)
#1, #3, and the honorable mention are Android only. This is a huge reason why I stay on Android.
I like using Lubuntu because it's lightweight and feels pretty snappy on my 2009 laptop.