OI Notepad - OpenIntents is a community effort to promote and discuss the use of Android intents and similar concept of modern mobile platforms.
vim-pad - Note-taking extension for Vim text editor.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Gollum - Gollum is a simple wiki system built on top of Git
FiiNote - FiiNote is the most convenient note app for android.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft