Emacs — Open Source Notes App

GNU Emacs is an extensible, customizable, free/libre text editor — and more. At its core GNU Emacs is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. The features of GNU Emacs include: * Content-aware editing modes, including syntax coloring, for many file types; * Complete built-in documentation, including a tutorial for new users; * Full Unicode support for nearly all human scripts; * Highly customizable, using Emacs Lisp code or a graphical interface; * A wide range of functionality beyond text editing, including a project planner, mail and news reader, debugger interface, calendar, IRC client, and more; * A packaging system for downloading and installing extensions. Notes regarding Android support: * The on-screen keyboard is automatically invoked when a non read-only buffer is tapped, and the user option `touch-screen-display-keyboard' arranges for it always to be displayed. * `modifier-bar-mode' may be enabled to display a panel of modifier keys beside the tool bar. * Permissions are not granted by default, but must be explicitly enabled in system settings menu. * External storage permissions may be granted by observing the instructions in the banner that is displayed on the splash screen if they are denied. * Answers to other questions probably exist in the Android appendix to the bundled Emacs manual. Read it!