All my paid apps for Android will have limited free versions that you can use as long as you want and without any ads. All my apps for other platforms are minimalistic "Simple" versions.
Apps
Any Kind of Love Calc.
prank
Audio Crank Clamp
audio, system
Calcusaur
calculator, numbers
Character Code Champion
reference, text
Chattering Critters
entertainment, audio
Click 2 Tally
numbers
Color Code Champion
design
Count Characters
text
Directometer
navigation
Frequency Monkey
audio
Fried SHA & MD
IT, other
Fur Cutter
prank, audio
Input Device Sleuthhound
developer, IT
Motion Fart Cushion
prank, audio
Mute that Thing!
audio, system
Number Twitcher
numbers
Number Words Writer
numbers
Numeral Base Switcher
numbers
Ramble Mix
text
Texture Alpha Edge Padder
design, image
Unit Convertor
numbers
USB Host Monster
developer, IT
USD Counter
money, numbers
URL Intent Prompter
other
Whipped
prank, audio
Your Fate in a Ball
prank, toy