Development

PX:VW - converter
PX:VW is necessary tool for adaptive design

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