アンプラグドな音が好きなのでフリーで集めてみました
native-instruments
https://www.native-instruments.com/jp/products/komplete/bundles/komplete-start/
heavyocity
https://heavyocity.com/products/?orderby=price&order=ASC
projectsam
https://projectsam.com/series/the-free-orchestra
impactsoundworks
https://impactsoundworks.com/products/category/free-instruments/
sonuscore
https://www.sonuscore.com/shop/the-orchestra-elements/
https://www.sonuscore.com/free-orchestra-chords/
fracturesounds
https://fracturesounds.com/product-category/free/
soniccouture
https://www.soniccouture.com/en/free-stuff/
8dio
https://8dio.com/collections/free-instruments
spitfireaudio
https://www.spitfireaudio.com/library-manager
https://labs.spitfireaudio.com/ja