AlgoDaily - Software interview prep made easy. Coding Interview Questions.
Coding Problems - Solutions for various coding/algorithmic problems and many useful resources for learning algorithms and data structures.
Edabit - Interactive coding challenges.
Go - Collection of 100+ popular LeetCode problems that I've solved in Go.
Python / Modern C++ - Many solutions.
Rust 4 - Many years.
aoc - CLI for reading, running and submitting Advent of Code challenges.