I design games in my free time. Here are some.

• 
  Wörterautomat Find as many words as you can with the letters of a given word.
  Adapted from an old family favourite.
• 
  Ricochet Robots Move robots to their goal in as few moves as possible.
  Adapted from the board game by Alex Randolph.
• 
  The Sorting Game Combine items two at a time into categories.
  Adapted from Victoria Roberts’ version of Thomas Colthurst’s original.

All are free to play in single- or multiplayer. None of them are original.
This one is:

• 
  Fallacy: The Game Play the worst possible arguments for a really productive discussion.
  Only in the physical world, but you can buy the cards.