Inkscape similar to Adobe Illustrator, Corel Draw, Freehand, or Xara X is an Open Source, free and uses the W3C SVG file-format as its native file format. The latest stable version is 0.48.5 that was released last year. The app is very nice and easy to use.
In this article see how to install Inkscape 0.48.5 on Ubuntu 14.10, Vivid Vervet, Ubuntu 14.04 Trusty Tahr, Ubuntu 13.10 Saucy Salamander, Linux Mint, Elementary OS, LXLE, Pinguy OS, Deepin and other Ubuntu derivative systems.
In Ubuntu Software center previous version 0.48.4 is available. So here we're installing 0.48.5 easily from the ppa -
$ sudo add-apt-repository ppa:inkscape.dev/stable
$ sudo apt-get update
$ sudo apt-get install inkscape