Links

Supergirl

The Supergirl Project – downloads of Supergirl comics from the Silver Age to the 1990s
Super. Girl. – a fresh, fun, breezy site devoted to exploring the history of Supergirl in comic books and her importance in pop culture
Supergirl Comic Box Commmentary – regular reviews of Supergirl comics and related Supergirl blogging
Superman Homepage – Supergirl Special Report – an in-depth profile of the Supergirl character and series, from the very first Supergirl in 1958, through to the end of Peter David’s 80-issue series.
DC Comics – Supergirl-tagged posts
The World of Supergirl

Carol Strickland’s Power Girl Index – a history of the creation of Supergirl and Power Girl
Alan Kistler’s Profile On: Power Girl (2005) – incredibly indepth history of Power Girl through Infinite Crisis
Power Girl in The Classifieds – an amusing fan video that captures the spirit of Power Girl. The actor and the costume are spot-on.
Power Girl @ Hyperborea – short, simple and sweet profile of Power Girl’s history up to and including Infinite Crisis (2005), wherein her original identity as the Earth-2 Supergirl is restored.
Power Girl: You Be the Judge – Ragnell debunks the urban legend about artist Wally Wood and Power Girl’s chest size
The Complete Power Girl Chronology – another well researched article by at Silver Bullet Comicbooks. Written in 2002 so stops short of the restoration of Power Girl’s origin

SuperHeroStuff.com – the largest selection of Supergirl-themed apparel including t-shirts, hoodies, pajamas, socks and undies, costume boots, swimsuits and related merchandise
PopFunk – Supergirl and many other female character t-shirts from DC Originals and other official DC licensees (ships to USA only)
AllPosters – a smaller selection of the Supergirl t-shirts available from SuperHeroStuff and PopFunk, but with international storefronts that ship to just about any location
BigBadToyStore – for all your action figure, statues, busts and collectibles needs
Mego Museum: Supergirl Mego Dolls – a gallery of the Mego soft dolls released during the 1970s, which included many female superheroes including Supergirl, Batgirl, Wonder Woman and Catwoman

Cory Walker’s Supergirl Redesigns
Draw Supergirl Meme – redesigns of Supergirl’s costume. See also Project Rooftop’s Supergirl Week Part 1, 2, 3, 4, 5, 6 with reactions.
Scans Daily: Supergirl/Kara
Scans Daily: Supergirl/Linda Danvers
Scans Daily: Supergirl/Cir-El/Mia
Scans Daily: Sterling Gates
Scans Daily: Jamal Igle
The Diary of a Midvale Orphan – a hilarious bit of fanfic taking place during the Silver Age “Midvale Orphanage” years, told from the perspective of another orphan who finds Linda Lee’s behavior just a little peculiar.
Odditycollector: Supergirl-tagged posts
Supergirl Interrupted – Youtube photo memorial of the 1996-2003 Supergirl series that chronicles the character’s history, starting with Linda becoming Supergirl and ending with her leaving her role in “Many Happy Returns”.
Supahboii’s Deviant Art – some very cool original Supergirl art, plus lots of great Superboy, Wonder Boy, Robin, Power Girl, Wonder Woman, Sailor Moon and other sketches

Fantastic Fangirls
Girls Read Comics Too
Superheroes are for girls, too! – “Superheroes aren’t just for little boys. Here you’ll find lots of images of little girls from past and present who also love them.”
Women in Comics Wiki