Sprite Fusion - Design your game with Sprite Fusion, the ultimate free online tilemap editor. Design 2D games with ease, direclty export to Unity Tilemap and Godot Scenes. Ideal for retro games!
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files
Tiled Map Editor - Tiled is a general purpose tile map editor.
JDraw - Open Source SF.net