The most popular alternative is Tiled Map Editor, which is both free and Open Source. If that doesn't suit you, our users have ranked 4 alternatives to LDtk so hopefully you can find a suitable replacement. Other interesting LDtk alternatives are PyMapper (Free, Open Source), OGMO Editor (Free, Open Source) and MapForge (Freemium).
- Tiled is a general purpose tile map editor.
- Drag and drop tile based mapping program. Multiple layers, create and import your own tilesets, scale for printing and many more features.
- Project-based editor with an Intuitive, holistic workflow made for indie developers.
- Map-making software for creating tactical-scale battlemaps for RPGs (or even some boardgames), with a large library of ready-to-use mapping content Add-Ons (including 10 free ones!). Also works with your own artwork/bitmaps, via drag-and-drop.