I am currently developping a sample foley/sound effects library for Kontakt, EXS24 and Structure and I'm looking for suggestions.
From your point of view, what would be useful and complementary to conventional sound effects libraries.
to your question, some useful sampler based fx libraries may include:
footsteps (obvious choice)
impact sweeteners, debris
gun shots and sweetening layers, gun handling
gadgetry and small servo patches
data/text on screen / typing / hi tech graphic fx
a nice instrument with effects and layers to easily create basic swooshes, transitions with the keyboard instead of spotting and editing library sounds.
rene and i's library have a few built for kontakt: www.echocollectivefx.com
I would suggest Omnisphere. I think it might be a good complement. It combines synth and sample sounds in a very interesting way.
Here's the final version of 2 Kontakt 3.02, Kontakt 4.2.4 (with GUI) and EXS24 footsteps patches. You need full retail Kontakt version.