Audacity- An Open Source audio editor

Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. It is a free

LibreOffice- An alternative to MS Office

LibreOffice is a powerful, free and open-source office suite, a project of ‘The Document Foundation’, a non-profit organization that promotes open source document handling softwares.