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For smaller maps Mapgen4 from Red Blob Games has lots of filters and you can paint terrain types across the map. The site also has lots of resource for procedural map creation. Roll for Fantasy's Map Creator also has a Random Map option. HexTML is a hex-based map generator with a "generate" option (under the "Map settings" cog)
For worldbuilding map gens there is Azgaar's Fantasy Map Generator which has many filters and modes in the options section. Then donjon has a fractal Fantasy World Generator.