Open source software is a type of computer software which the copyright holder grants rights to users to use it for any purpose.

1.	LibreOffice - This software in an alternative to Microsoft office. This supports documents, spreadsheet, database, etc. 

2.	LibreCAD – This software is for 2D drawings and can be alternative for AutoCAD.

3.	GIMP – For Graphic designers out there, here’s the good news for you. GIMP is a photo editor software that provides you high quality photo manipulation. This can be an alternative to Photoshop.

4.	VLC Media Player – Of course the leading popular media player. This software gives you amazing features, it can open audio and video in almost any format. I recommend using this.

5.	OpenShot Video Editor – This Video editor is simple and easy to use. It supports many video, audio, and image formats. Different tools and video effects can be used. If you’re looking for free video editing software you can give it a try.