How can i share a PowerPoint presentation in Skype conversation? i'm a non-premium subscriber of Skype
You can use Skype Screen Sharing feature https://support.skype.com/en/faq/FA10215/how-do-i-share-my-screen-in-skype-for-windows-desktop, just remember not to turn on your video during call as sending video and sharing screen at the same time requires Skype Premium.
Or, if you use MS PowerPoint 2013, you can try http://office.microsoft.com/en-us/powerpoint-help/present-online-using-the-office-presentation-servi...
shamimmurad, you can also use a separate program which is dedicated for sharing presentations live to remote audiences.
For more information, check out this article http://blog.presefy.com/best-way-to-show-powerpoint-presentations-during-skype-calls/