[Root Me

French hacking platform with hundreds of free challenges and a long-running community.

Root Me is a free platform with web, cracking, cryptanalysis, network, forensics and reverse engineering challenges, plus sandboxed virtual environments and a French-first community. It is a training site rather than a bounty one, so it may fit better under Training Platforms. The saved link points at its news page.

Why it's useful

Classic, no-cost practice ground with a very wide range of challenge types.

Category: Training Platforms & Labs
Pricing: Free (with optional premium)
Tags: ctf, training, challenges, platform
Link: www.root-me.org