You can create a neat logo from the Linux command line:

$ convert -size 800x120 xc:white -font Times-Roman
-pointsize 100 -fill gray -annotate +20+80 'Linux is cool!'
-fill black -annotate +23+83 'Linux is cool!' -trim
+repage logo.png

And, the following command should display the result:

$ qiv logo.png

If you want to play with multiple colors and fonts, the following will help:

$ convert -list type
$ convert -list color