Open source voip android

http://en.wikipedia.org/wiki/Linphone

http://en.wikipedia.org/wiki/CSipSimple

http://en.wikipedia.org/wiki/Sipdroid

downloading youtube video with VLC

First of all go to the YouTube video page which you want to download. Now open your VLC player. Click on Media-->Open Network stream. Paste the URL of the YouTube video page and click Play. Once VLC starts streaming the video.

To download the video,click Tools-->Codec Information and at the bottom of the window you will see a Location box. Copy the URL and paste it on your browser’s address bar. Now download will start.

installing ipython on centos

easy_install ipython