Tilemap Studio 2.0 is now comparable to Tilemap Creator, NTME, or NTME+: it supports GB, GBC, or GBA tilemaps, as well as the particular formats for Gen 1 and 2 Town Maps (it started as a Town Map editor, after all).
https://github.com/Rangi42/tilemap-studioThe most significant missing feature is placing multiple tiles at a time, like Grosser Block in Advance Map, but I'm planning to add that in 2.1.
