By Pass proxy server to open sites like TopCoder, IRCTC ticket booking etc

This is intended for users having proxy issues while opening some sites and using Mac OS. Don't worry, the same method works for Windows as well :)

1) UltraSurf

1.1) Download UltraSurf here
1.2) Install UltraSurf and click "Option" button
       1.2.1) Go to Proxy Settings and enter Proxy Host and Port manually. Its "10.3.100.207" and "8080" in case of my institute i.e. IIT Kharagpur
1.3) Click "Retry" button
1.4) Now change System Proxy, Java Control Panel proxy and Topcoder Applet proxy as "127.0.0.1" and port as "9666"
Note : Choose Connection :"HTTP Tunnel A" in Topcoder Applet

2) Tor Browser Bundle 

2.1) Download Tor here . Note this is for 64 bit Mac OS. For other OS, go here
2.2) Enter your proxy and port while installing Tor. Its "10.3.100.207" and "8080" in case of my institute i.e. IIT Kharagpur
2.3) After installation, go to "Preferences" > "Advanced" > "Network" > "Settings" and check whether proxy is "127.0.0.1" and port is "9150"
2.4) Now you can open any site from this Tor Browser