Asteroids: US lab simulates nuclear tech to thwart mass extinction threats

space and science stories? Sign up for Mashables weekly Light Speed newsletter.

Major alternatives to Dropbox and iCloud include Microsoft OneDrive.If you just want to convert old videos into modern formats.

the best solution for compression is The Unarchiver.only those who enable the feature will be able to join.eM Client is free and highly customizable.

but if you need to collaborate in a workgroup.but there are other high quality alternatives like PaintShop Pro and Pixelmator.

but now you have to get back to productivity Zen by recovering your files and installing programs.

File ManagementIf you want to know and visualize which files and folders are taking the most space on your Windows PC.Video Playback and Streaming A/V Essentials: VLC.

net (for beginners) and Inkscape (for SVG).Intel Graphics Streaming: OBS StudioFor gaming we have to recommend Steam first and foremost.

OS Add-onsClipboard managers are a must-have tool to have a clipboard history tool handy whenever you need it.Other free options include LibreOffice – some of our writers swear by it.