Notes are one of the most important and useful features in daily life, especially when moving between mobile, web and desktop.
Kolab Notes is wonderful solution for that which I use daily. Available via F-Droid and Google Play, Kolab Notes supports multiple Kolab servers / accounts and allows you to take notes on the go and look up notes on your phone.
My standard use cases are the "let's read this later" over having minutes of our meetings in a shared folder on a Kolab Server always available for looking up and editing on the phone. Also what I really like is making quick scribbles - the paint mode is great fun. I've set up screens for work and personal on the phone, each with two widgets on them: Task lists & notes, from the personal and work accounts. That way it is easy to have the entire picture and all relevant information quickly at bay.
So in case you are using Android -- perhaps even a fully Free Software community ROM without Google Account -- Kolab Notes is the perfect companion for your fully liberated mobile experience. Written by Kolab community member Konrad Renner as fully Free Software / Open Source, it is your secure, private way to keep track of your notes with all the benefits of "the cloud."