Development

X11-Basic
BASIC interpreter

SimpleTextEditor
Simple Text Editor

Intent Intercept
Dev tool to view inter-app communication

Smart Card Emulator
Use your phone as contact-less smart card

Custom Riddle Generator [small, no ads]
A tool app to create your own custom riddle apps (number->text/image).

Brainf
Interpreter for the 'Brainf' programming language

isUserAMonkey & isUserAGoat [curiosity]
The android sdk has strange functions called 'isUserAMonkey' and 'isUserAGoat'

Adnihilation
This is just a very small app to allow you take out on those nasty ads.

Termux:Tasker
Tasker plug-in to run Termux scripts from Tasker

Cryptix
a minimalist unit/code converter

kubenav
kubenav is the navigator for your Kubernetes clusters right in your pocket

TonUINO NFC Tools
Read and write NFC Tags for TonUINO

Anchr for Android
Anchr is a manager for all your important bookmarks and link collections

FHCode
Code editor for android

Termux:Float
Use Termux in a floating terminal window

Termux
Terminal emulator with packages

Termux:API
Access Android functions from Termux

tldr man-pages
tldr, simplified and community-driven man pages.

QuickTiles
Android Quick Settings Tiles

MIFARE Classic Tool
An NFC app for reading, writing, analyzing, etc. MIFARE Classic RFID tags.

UserLAnd
Easiest way to run GNU/Linux Distros on Android - no root required

Wirebug
Enables or disables debugging over Wi-Fi

Ning
Ning: Simple and fast local network scanner. Similar to Fing or Nmap

RoboZZle Droid
Robot programming game

Man Man
View, download and search Linux manpages

XClipper - Smart Clipboard manager for Android
A smart clipboard manager for Android with synchronization feature.

TTL Editor
Change TTL of networking packets

BF Interpreter
Brainfuck language interpreter

ADBKeyBoard
Android Virtual Keyboard Input via ADB

RasPi Check
Check the status of your RasPi