Another fine utility out of the SSRG has been released, this time it’s a new edition of SHWP:
It has many new/improved features, but the best part is the integration of S.L.E.E.P. (created by Tristan Penman)! The Sonic 2 level editor in SHWP cannot use tilesets written for S.L.E.E.P., but the tilesets for the S2LE are smaller than the S.L.E.E.P. tilesets. Plus, S2LE tilesets are made almost immediately after S.L.E.E.P. tilesets come out.
The new editor is available here.