Hi,
I use TabNotes (from cc-rom) for general note taking and todo lists all the time and I find it is well suited to landscape mode. I can switch between tabs using my left thumb without having to take my hands off the keys (although I just realized some keyboard shortcuts need to be added). TabNotes doesn't have a huge user base, but a few people find it useful and the Pro1 is ideally for the app.
https://play.google.com/store/apps/details?id=com.cc.rom.tabnotes
Disclaimer, I wrote the app myself when I couldn't find anything that worked the way I wanted with a physical keyboar