Universal pencil puzzle editor capable of drawing many different kinds of pencil puzzles. You can also solve problems in the software.
Features an extensive list of level design tutorials covering principles of gameplay, design, layout and workflows using various games, level editors and game engines.
Online dungeon editor
editor of encrypted files that supports YAML, JSON and BINARY formats and encrypts with AWS KMS and PGP
Great lighweight alternative to a full-fledged CMS