Hi folks, I know how it feels when you pay a fee to use the Full Version of Kontakt, and still pay an additional fee for third-party Library instruments, it is absolutely normal, the guys producing the Kontakt library instrument has tirelessly worked on their product, and will also need some fee to continue the good work.
Having said that, you would find a list of free and paid Kontakt Library instrument on this page.
It has been categorized by
Percussion & Drums Libraries
Sound Effects, Vocal Libraries