ALGORITHM - red black tree good show case practicing

http://tommikaikkonen.github.io/rbtree/#

JAVA - opensource github java non-mobile apps

http://habrahabr.ru/post/266821/

BINARY - calculator

http://www.calculator.net/binary-calculator.html?b2dnumber1=10101010&calctype=b2d&x=75&y=16

UML - good illustration

http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/

DATA STRUCTURE - heap tree

http://habrahabr.ru/post/246105/

JAVA - Hashmap

http://habrahabr.ru/post/128017/
http://habrahabr.ru/post/164027/
http://habrahabr.ru/post/162017/
http://javarevisited.blogspot.com/2011/02/how-hashmap-works-in-java.html
http://javahungry.blogspot.com/2013/08/hashing-how-hash-map-works-in-java-or.html

JAVA - understannding recursion in conjunction with JVM stack

http://www.javamex.com/tutorials/techniques/recursion_how.shtml

MONGO_DB: Thinking in Documents presentation

Basic things about MongoDD - Thinking in Documents

Slides: http://goo.gl/4d59xS
Video: https://goo.gl/CgG2VR

GWT custom event- link

http://stackoverflow.com/questions/2951621/gwt-custom-events/2967359#2967359

DATA STRUCTURE - Persistent Data structure

In computing, a persistent data structure is a data structure that always preserves the previous version of itself when it is modified.

https://en.wikipedia.org/wiki/Persistent_data_structure