Lindon
VST/AU Developer
Before we all head off into a comparison between HISE and Kontakt - there's this:
Some of its a bit out of date now - as HISE has moved on (as usual at a much quicker pace than Kontakt) but it will give you a flavour...
For Those of Us Considering Jumping from Kontakt to HISE
A little background: HISE is an open source framework for creating sample libraries. It seems to have the usual mapping, scripting, and other sampler features we'd see in Kontakt or Falcon or Halion, although probably requiring more effort, since it's designed for developers rather than users...
vi-control.net
Some of its a bit out of date now - as HISE has moved on (as usual at a much quicker pace than Kontakt) but it will give you a flavour...