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Games like Opuscule

A 2D Character Portrait Generator.
Small synthesizer for Orca and Marabu
The text editor.
Free game sound effects tool
Run in browser
New Music Generator from 月崇拝Corp.
The graphic design tool.
Standalone Tool for Pixel art Games , Customize and Export Sprite Sheets for pixel art Games.
Famicom spritesheet and nametable editor
A quick and easy to use drag and drop retro game creator for your favourite handheld video game system
A free, easy to use tool for creating music!
Animated sprite editor & pixel art tool
The livecoding environment.
The vector tool.
Markdown editor and organizer
A Blender add-on for building tile based low-poly scenes with paint/map editor like tools
Procedural Generation Pixelart Editor
3D Game Engine for Blender
Plugin development made easy
Open-source node-based tool for developing branching conversation trees