For a while during the late 80's and early 90's, fractals were all the rage. I was very enthusiastic about them at the time; it was like exploring a new world using a computer. I haven't really touched them since about 1992 when I got distracted by my Ph.D., but this is a nice little collection.
Some of these have been used in research papers or on book covers, there were also some postcards produced by The Mathematical Association in Britain although I'm not sure if they're still making them. Oh yes, there was a calendar too! This was a lot of fun doing all these. Some of the are collaborations with Rob Pomphrett, with whom I studied at Sussex University. Most of the images themselves have copyright details on them but even in cases where they do not, they are all wholly or partly © Ian Giblin and should not be reproduced without permission.
I'm sorry I haven't got time to go into the mathematics behind each one; it's all very interesting I can assure you. Most of these are derivatives of Mandelbrot or Julia set images. At the end are some simple landscapes generated by a midpoint displacement method.