An official suite of tools (including a Debugger and Project Panel) designed specifically for Kontakt instrument developers. Kontakt Player & Full Kontakt Player
Instead of forcing a library into the side browser, many users now use the Quick Load feature, which allows for instant access to folders without needing a .nicnt file. kontakt library creator klc download free
The free allows you to play officially licensed libraries but does not include tools to build your own instruments or edit existing ones. Options for Kontakt Content Creation An official suite of tools (including a Debugger