You can download this free VST plugin 100% free from Native Instruments official website.
If you can not afford to buy Kontakt 6 full version or the Native Instruments Komplete bundle you should at least download Kontakt 6 player free along with Komplete Start which is a free bundle with 2,000 sounds and 6 GB of content. The Native Instruments Kontakt sampler VST plugin has been a staple in the music producer community for over 10 years now. Over the years there has literally been thousands of Kontakt libraries released ranging from trap sounds, lofi jazz sounds, realistic keys & strings all the way to ambient sounds and vocal chops.