[MikeTV]

You might be interested in "Code Katas" - small, targeted programming exercises. Check out codewars.com, codekata.com, codekatas.org, etc.

Also check out ACM Competitive Programming problems [0]. They're small projects, usually centered around logic, mathematical calculations, and data processing. If you want a challenge, take one year's problems and try to complete all eight in under five hours without an internet connection (physical reference material allowed).

[0] https://icpc.baylor.edu/worldfinals/problems

[zabana]

Thanks a lot for your answer, I will definitely look into these resources !