Potential challenges

Shuffle a List of Numbers
Count the Number of Distinct Elements in a List
Print the Decimal Value of PI to Millions of Digits
Turing-complete Code Golf in Befunge-93
Compute Roman Numerals
Searching for a Substring in a String
Remove Duplicate Lines
Print a List of All the Files in a Directory
Input a Number Between 1 and 5
Sieve of Eratosthenes in Befunge-93
Number Guessing Game in Befunge-93
Countdown Timer in Befunge-93
Print a List of Files Containing a Word
Befunge Maze Generator
Print a Sudoku Grid
Generate Random Words from a Given Pattern
Fibonacci Series, Recursively
Search for an Element in a Sorted List
FizzBuzz in Befunge-93
A* Search Algorithm
Print the Last N Lines of a File
Stack Overflow
Reverse a String and Print it Backwards
Generate Random Strings from a Given Pattern
Print the Binary Value of a Number to Two Digits (