Fringepedia, the Fringe Wiki, has a list of all the Fringe symbols / glyphs that have been used on the show and in the viral / ARG. The high-resolution symbols let you see all the interesting detail, and are accompanied by brief explanations, plus some of the Fringe Symbols have videos as well.
Here you will find screen captures of each episode of Fringe which are of special interest and/or that contain easter eggs. Easter eggs are hidden content intentionally inserted by the creators of Fringe. If you would like to request a screencap, you can do so by leaving a comment here.