This app was mentioned in 11 comments, with an average of 2.00 upvotes
It's a text editor, the reason that I use it over others is that it has customizable shortcuts for text entry and it's extremely simple to create different "profiles" each with different shortcuts.
Slowly transitioning completely to Epsilon Notes, which is the same with markdown and html/pdf export.
I've used EN for a long time, but have only recently begun to edit the toolbars in the same way I have been doing for years with Jota+.
Possibility to customize what rows are shown? Not very useful in landspace mode as it takes 2/3 of the screen space in landspace mode (1280x720).
I find the visual keypress feedback thing distracting since it doesn't extend to bottom the key (e.g. in Google Keyboard).
Tab works inconsistently. In Jota+ plain text editor pressing tab once results in 4 spaces + 1 tab press in total, then for example on Chrome and Lightning browser address bar it results in 5 spaces.
Plain text editor: Jota Text Editor, ignore the off-putting anime wallpaper, it is not even turned by default iirc. One unique feature I've not seen in any other: a customizable toolbar (open/save/copy/cut/paste/BOL/EOL etc).
AIDE... a full IDE.
https://play.google.com/store/apps/details?id=jp.sblo.pandora.jota.plus
Jota! It has autosave! Takes a little getting used to but well worth the time.
Crazy idea: install Termux and then install Emacs.
Jota+ Text Editor... just don't expect all of those features.
If* you have a Bluetooth keyboard you can set shortcuts to everything from cut & paste to home/end, tab switching, emulating key presses, special characters etc. Ignore that anime wallpaper in the screenshots.
* at least I have never figured out what would be the modifier key on a virtual keyboard.
You'll only need to go into settings once to add "word wrap" to the bottom scrolling toolbar.
Jota+ Editor
https://play.google.com/store/apps/details?id=jp.sblo.pandora.jota.plus
(Edit: The link by playstorelinks_bot is wrong)
Here are a few that I've found to be decent, however let me say that I'm still looking.
Jota. Claims to be the best text editor for Andriod - https://play.google.com/store/apps/details?id=jp.sblo.pandora.jota.plus
FX File Explorer. Includes a decent text editor - https://play.google.com/store/apps/details?id=nextapp.fx
Simple Markdown. Decent but quirky markdown editor/viewer - https://play.google.com/store/apps/details?id=com.wbrawner.simplemarkdown
There are lots of fine text editors. In the free category I use a couple:
Text Edit Text Edit (A text editor) - https://f-droid.org/app/org.paulmach.textedit
Writeily Pro Writeily Pro (Edit markdown files) - https://f-droid.org/app/me.writeily
And then I'm also very glad to have
https://play.google.com/store/apps/details?id=jp.sblo.pandora.jota.plus
For bigger tasks.
Jota+ is an Android text editor with built-in org-mode support: https://play.google.com/store/apps/details?id=jp.sblo.pandora.jota.plus
Yes I also have DroidEdit(free version only)
... as well as
Jota+ (Text Editor) - Pro version needed for Dropbox/Google Drive
DroidVim very fast but steep learning curve if not familiar with Vim(Dropbox/Google Drive available)
I<code> Go - Code Editor / IDE I use it mainly for its code folding / it's slow / (Dropbox/Google Drive?? - haven't tried it)