1. Pixel by Hiroto Yoshizoe https://www.hirotoyoshizoe.com/pixel/ (Accessed on July 5 2018.) Pixel by Hiroto Yoshizoe https://www.hirotoyoshizoe.com/pixel/ (Accessed on July 5 2018.)
2. UMU Glass http://www.umupro.com/index.html. (Accessed on July 5 2018.) UMU Glass http://www.umupro.com/index.html. (Accessed on July 5 2018.)
3. Halio https://www.agc-yourglass.com/agc-glasseurope/gb/en/interactive/halio/news.html (Accessed on July 5 2018.) Halio https://www.agc-yourglass.com/agc-glasseurope/gb/en/interactive/halio/news.html (Accessed on July 5 2018.)
4. Dynamically transparent window
5. David Lindlbauer Toru Aoki Robert Walter Yuji Uema Anita Höchtl Michael Haller Masahiko Inami and Jörg Müller Tracs: transparency-control for seethrough displays. the 27th annual ACM symposium on User interface software and technology (UIST '14) pp. 657--661 2014 10.1145/2642918.2647350 David Lindlbauer Toru Aoki Robert Walter Yuji Uema Anita Höchtl Michael Haller Masahiko Inami and Jörg Müller Tracs: transparency-control for seethrough displays. the 27th annual ACM symposium on User interface software and technology (UIST '14) pp. 657--661 2014 10.1145/2642918.2647350