https://www.alessandromazzanti.com/2010/12/motore-di-ricerca-per-immagini.html
- http://www.veezzle.com/
It is a portal website that seek images shared on other websites like Flirk, Picasa like freely usable photos found surfing on web. - A good alternative could be Dreamstime as well.
- About vectoria images you could find interesting this blog post too (Vectorizados.)
- https://www.canva.com/
photos/. Canva has millions of high-quality stock photos to use for all our design needs. Their collection includes both premium and free stock photos, and we can find the latter here:
https://www.canva.com/photos/tag/free+photos/.They have recently put together this resources because their users have found it useful.