The logos are optimized (removed unnecessary paths/groups/defs, standardized, etc). Some were recreated from rastered images.
All logos appearing on the site are the property of their respective owners. Any rights not expressly granted herein are reserved.
Since I optimize all the files manually I won't accept pull requests with new logos. And that's why they look so good.
Please add your requests in the issues preferably with links to the vector files.