ARVAL Catalog of Bright Planetary Nebulas: A text table, with name, size, magnitude, area, NGC number, type, RA, dec., and visual quality.
Hubble's Planetary Nebula Gallery (PRC97-38b):
Planetary Nebula Sampler:
Planetary Nebulae: A short discussion, part of a web page on plasmas.
Planetary Nebulae Gallery: A data table with links to images.
Variability of Planetary Nebula Central Stars: