LDtk – Modern 2D level editor with strong focus on user friendliness

LDtk (short for Level Designer toolkit, formerly called LEd) is a free and open-source 2D level editor for Windows, Mac and Linux platforms, developed by deepnight (Sébastien Bénard) from France, who are the former director of the well-known indie game Dead Cells, with 20+ years of experience for creating various games.