noise4j

Has no external dependencies and is compatible with Java 6 and GWT, making integration straightforward without bloating the build, as highlighted in the dependency section.

Uses a lightweight 1D float array wrapper for 2D operations, allowing arbitrary value ranges and manual mathematical adjustments via the Grid class, per the README's philosophy.

Supports merging multiple generator outputs, such as noise and cellular automata, to create complex maps like islands or caverns, demonstrated in the combined examples.

Offers configurable parameters for each generator, like radius, modifiers, and room types, enabling fine-tuned control over map aesthetics, as shown in dungeon and cellular examples.