A professional vector graphics editor for Windows, Mac OS X, and Linux.
Ranked in these QuestionsQuestion Ranking
Pro Free and open source
Inkscape is GPL-licensed and maintains public repositories.
Pre-built binaries are available for Windows, Mac and Linux. Inkscape can be built from source on additional platforms.
Pro Opens lots of file types
Inkscape supports many common formats for import (including SVG, Photoshop and Illustrator) and its plugin architecture allows more to be added.
Pro It's really easy and fun
You can edit and create vector graphics with Inkscape.
Sometimes it just crashes without any reason, so it's not really usable as professional application.
Con Uses its own SVG-format
Inkscape might use SVG as its default format, however this SVG's contains some additional SodiPodi/Inkscape additions that can be troublesome if you want to import the SVG into some other application.
Con Incompatible with previous versions
Sometimes backward compatibility breaks. For example, pre 0.92 SVGs are incompatible with later releases (due different default resolutions).
Con Very slow startup on some systems
Depending on factors like how many fonts you have installed, Inkscape can take upwards of 30 seconds to launch.
Con Based on the GTK widget toolkit
Software is based on GTK, so it might not integrate well in non-GTK environments. It also requires many dependencies on those non-GTK desktops. It also adds dependencies to GTK-environments since it is written in C++ which requires the gtkmm wrapper/interface
Con Y-axis inverted
0,0 coordinates begin in lower left corner, not upper left corner as SVG standards define.