Source

Books

http://www.introprogramming.info/intro-csharp-book/
http://www.introprogramming.info/intro-java-book/

http://it-ebooks.info/

http://stackoverflow.com/questions/194812/list-of-freely-available-programming-books/392926#392926
http://jsbooks.revolunet.com/
http://programming-motherfucker.com/become.html
http://www.hongkiat.com/blog/20-best-websites-to-download-free-e-books/
http://www.ebooksocean.com/cgi-sys/suspendedpage.cgi
http://bookos.org/
http://booksc.org/
http://gen.lib.rus.ec/

Cheat sheets

http://www.cheat-sheets.org

• HTML – http://www.addedbytes.com/download/html-cheat-sheet-v1/pdf/

• CSS 2 – http://www.veign.com/downloads/guides/qrg0007.pdf
  http://www.veign.com/downloads/guides/qrg0008.pdf 

• JavaScript – http://www.addedbytes.com/download/javascript-cheat-sheet-v1/pdf/
  http://www.visibone.com/regular-expressions/
• jQuery – http://woorkup.com/wp-content/uploads/2011/12/jQuery-17-Visual-Cheat-Sheet1.pdf
• MySQL – http://www.addedbytes.com/download/mysql-cheat-sheet-v1/pdf/
• XSS – http://ha.ckers.org/xss.html

On-line courses

https://www.coursera.org/

http://www.codecademy.com

http://nau4i.me/

http://www.homeandlearn.co.uk/php/php.html

English

http://www.sourcecodeonline.com/

https://github.com/

Bulgarian

http://telerikacademy.com

http://academy.telerik.com

http://noit.devbg.org

http://www.nakov.com

http://hristov.bg/

http://minkov.it/

http://nikolay.it/

http://www.networkedblogs.com/panorama

http://www.introprogramming.info/intro-csharp-book/

http://www.devbg.org/dotnetbook/Nakov-Programming-.NET-Framework-Book-Volume-1-ver-1.03.html

http://www.kursove-uroci-knigi-obuchenie-programirane-web-design-csharp.info/

http://bgcoder.com/

http://it-interviews.com/

http://totaloff.com

http://pavelkolev.com

http://todormitev.wordpress.com

http://itgeorge.net

http://veselinaraykova.wordpress.com

HTML 

http://www.addedbytes.com/download/html-cheat-sheet-v1/pdf/

https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5/HTML5_element_list

CSS 2

http://www.veign.com/downloads/guides/qrg0007.pdf http://www.veign.com/downloads/guides/qrg0008.pdf )

JavaScript 

http://www.addedbytes.com/download/javascript-cheat-sheet-v1/pdf/ http://www.visibone.com/regular-expressions/

jQuery

http://woorkup.com/wp-content/uploads/2011/12/jQuery-17-Visual-Cheat-Sheet1.pdf

MySQL

http://www.addedbytes.com/download/mysql-cheat-sheet-v1/pdf/

XSS

http://ha.ckers.org/xss.html

Developer Profile

http://github.com/

http://www.codeplex.com/

http://code.google.com/intl/bg-BG/

Bulgarian

http://www.internetpolyglot.com

FIND JOB

http://bgrabotadatel.com/

http://karieri.bg/forum

http://jobs.bg

http://jobtiger.bg

http://itjobs.bg

http://rabota.bg

http://jobspace.bg

http://bestjobs.bg

http://orjo.com

http://buljobs.com

http://career.fmi.uni-sofia.bg

http://career.fu-sofia.bg

http://www.nbu.bg/index.php?I=264