For high quality artworks sticking around with traditional psd freebies wont help as resizing them to a higher resolution reduces or say rasterizes the image unless it is a smart object. That is why vectors hold much importance to professional designers as comprising on image quality is not an option. High quality illustrations need high quality vectors to play around, so it will be a boon to artists if they get free vectors especially in eps format.
Designing a poster or even a abstract background is very hard in illustrator if it is to be built from scratch. To reduce and save lots of time there are free high quality vectors available on the net. We have thus collected 30+ High Quality Vector Graphics For Designers who like high quality content.