Here is a list of all the websites I subscribed to. Those are very interesting and cover a wide variety of topics. A few of them are in French though.

Android

• Android Developer Backstage
• Android Developers Blog
• Cyril Mottier
• Official Android Blog

Some friends of mine

• Eric Gourlaouen
• KtorZ's Blog
• Trip and Tech blog
• Kyâne Pichou

HTML/CSS

• HTML5Rocks
• La Tête dans le Flux
• CSS-Tricks

Humor

• CommitStrip (English feed)
• HOP

Other

• AdminRezo
• Armin Ronacher's Thoughts and Writings
• Blog - Susan J. Fowler
• Clément Delafargue - RSS feed
• De geek à directeur technique
• GBProd
• Git Attitude
• Communauté Mozilla francophone
• GuiGui's show
• Informatique – David Mercereau
• Joel on Software
• K33G_ORG's blog
• Korben
• L'ingénu-ingénieur
• La Lanterne Rouge
• putaindecode.io
• TechMeUp » TechMeUp
• Yegor Bugayenko
• niKopiK
• ②ality – JavaScript and more
• Mozilla Hacks – the Web developer blog
• Martin Fowler
• Increment
• Infrequently Noted
• Les sorties de la semaine
• Je suis un dev

Security

• A Few Thoughts on Cryptographic Engineering
• hackndo