[zumu]

Rofi is pretty great.

I'm also shamelessly addicted to guake (drop down terminal). I know there are more robust alternatives, but having grown up with Quake/CS, it just feels right.

[dnlsrl]

I wanted to use Yakuake but it's for KDE and didn't want to install a complete DE just to use its dropdown terminal. Guake is a fairly good alternative, but I'm having an issue with it that it somehow makes title bars and top menus unclickable, which forces me to terminate it every now and then start it again.

[zumu]

I have not had those issues, and I'm actually using guake with KDE atm. You might be able to get yakuake working on non-kde. What DE are you using?

[dnlsrl]

I have XFCE, but when trying to install, it included the whole KDE DE as dependency, which I don't really need.

[sidcom]

You can launch xfce-terminal in drop-down mode..

[feydaykyn]

The debian/ubuntu packages were pretty outdated at some point, I had to install the latest version manually to fix a bunch of issues just after updating to 18.04