theproblemsite.com 的前十大競爭對手

dcode.fr

Outil de contact et support avec tout ce que qu'il y a à savoir sur dCode et à propos de ses auteurs, son fonctionnement... Informations sans cryptage ;)

cryptii.com

The Beaufort cipher, created by Sir Francis Beaufort, is a substitution cipher similar to the Vigenère cipher. Unlike the latter, encryption and decryption using the Beaufort cipher uses exactly the same algorithm.

boxentriq.com

Try your skills on these web puzzles.

morsecode.world

morse code world: the number one resource for morse code on the internet. information, translation, decoding and training tools for international and american morse code.

virtualescaperooms.org

Find answers to common questions about our virtual escape rooms. Learn how they work, who can play, setup tips, and more in our FAQ guide!

edu-games.org

Excellent arithmetic practicing game. You get a worksheet with arithmetic sums, but the operators are missing. The goal is to find the correct operators.

englishworksheetsland.com

a huge collection of teacher and student worksheets for english lasite-logonguage arts!