Linux Equivalents to Windows Software The Linux Equivalents to Windows Software series now contains 228 entries, listing the finest Linux software available. Read about our latest addition: emesene - an open source instant messaging client, a "clone" of Windows Live Messenger. In case you missed our announcement, also check out our 80 of the Best Linux Security Applications. (Read more) DivX DivX is a free codec offering built to play every version of DivX content ever created. An update of our core technology, the DivX codec also plugs into your existing video software so you can easily create high-quality DivX videos at a fraction of the original size.