Some good links

https://www.html5rocks.com/en/tutorials/internals/howbrowserswork/

http://taligarsiel.com/ClientSidePerformance.html -- Client side performance tips

https://ariya.io/

https://vertx.io/docs/ -- New exciting Framework, Must read.

https://javaee.github.io/ -- Very good resource to see various javaee projects and explore enterprise architecture and design concepts.

https://projects.eclipse.org/projects/ee4j -- Lots of interesting open source projects by eclipse

http://openjdk.java.net/projects/mlvm/ -- the main project for supporting more dynamic languages to jvm.

http://esprima.org/ -- EcmaScript parser

http://c2.com/ppr/ and http://hillside.net/ -- Good place to learn patterns

http://cr.openjdk.java.net/~briangoetz/lambda/Defender%20Methods%20v4.pdf

https://validator.w3.org/nu/ -- This will validate your website css and js

https://www.cellstream.com/intranet/reference-reading/faq/216-what-is-2-128.html

http://shattered.io/ -- An example of SHA1 collision attack.