RoomShaker is a modern Prince of Persia 1 level editor for Windows.
Its official website can be found, via the Internet Archive, here.
Download: RS180_Rel25.zip (486kB)
Version 1.80 was released by Brendon James on 8 August 2016.
Wine users may need to install some additional DLL files:
$ winetricks corefonts vcrun6
Old version (1.79, 8 April 2010): RS179_Rel24.zip (485kB)