I'm in the process of building my own library of field recordings and sounds. I've decided to let most of them loose on my Freesound.org page as a way of giving back to the community there. All sound will be on a Creative Commons license and some of them will be available for commercial projects. Right now there are only a few recordings there but I have quite a few that are waiting on moderators to accept. I'll be adding more and more on a consistent basis.
If you find this sort of project useful to you, please check out my Patreon page and consider pledging your support. Those that do will receive higher quality versions of the sound files that I'm uploading as well as some other benefits. My Patreon page describes a bit more in detail about how I'm handling this project.
Thanks!
Here are all those links again...
http://www.pureshift.com
http://patreon.com/wchrapcynsk
http://www.freesound.org/people/theshaggyfreak/