It's the official resource format for Glk.
How do I make one?
There's a couple of programs out there, though they tend to be a little tricky to use or to adapt to a particular platform. Fortunately, I've also come up with some blorb utilities for DOS that should be reasonably portable
iblorb: the blorb-inform program suite:
- blc: Blorb Packager -- generates blorb files from a simple control-file
- bres: Blorb resource compiler -- generates blc control files and inform source from a resource file. Allows users to easily integrate blorb resources into inform-compiled programs by generating an inform header file which makes blorb resources available within a program
- bpal: Blorb palette editor -- a simple program to create blorb palette information either by specifying palette entries or by extracting the palette from a png graphic.
- front: Inform Frontend -- automates use of bres, blc, and inform to generate a blorb inform program in one step
- bmerge: Blorb Merge -- Allows multiple blorb files to be combined into a single file (so that, say, sound and pictures may be distributed in separate blorb files, then combined later.)
Download iblorb as either source, MS-DOS binaries or (untested) Linux i386 libc6 ELF executables.