If you look at pages 28-31 in this PDF, you'll see a neat piece of font debugging software called 'Otted' for Mac and Windows.
http://blogs.adobe.com/typblography/atypi2006/OpenType_Status_2006.pdf
I imagine this is someone's internal tool, but does anyone know more about it? Seems very handy.
OTTED is a very sophisticated OpenType table editor developed at URW++ under supervision of Dr. Juergen Willrodt. Besides the option to edit the tables, it currently has for instance a couple of viewers (font, glyph, embedded bitmap and GPOS/GSUB), a consistency checker and a tool to copy glyphs.
At the moment OTTED is in use at URW++ and the Dutch Type Library and it will be offered via the DTL FontMaster web site shortly.
Captured from commoncrawl.org on 19 Apr 2015. original URL