How can I create an abstract sea/wave effect in a free vector package?
I'm looking to create a vector (ideally) illustration with an abstract sea, much like this (not the dolphins or sun):
How can I go about this using free tools such as Inkscape?
You can start by watching this tutorial on how to create wave-like vector shapes in Inkscape. Then the fill you want are shades of blue gradients that goes from blue to transparent with a stroke around the lighter shades of blue.