Period Porn
Erotic Red - members only menstruation paysite featuring various adult models
Personal
Bloody Trixie - menstruation fetish site by "web whore" Trixie
BLEED - infamous menstrual diary by Erica Jackson
Communities
Vermillion Magazine - free online magazine on menstruation and feminine topics
The Flow Forum - curious men ask women about menstruation, women share insights on the monthly period
Blood Art - live journal community of women making art with and about menstrual blood
Museum of Menstruation and Women's Health
Film
That Time of the Month - short movies on various menstruation practices all over the world, presented by VPRO Metropolis TV in the Netherlands
Period: The End of Menstruation - movie tackling the difficult topic of menstrual suppression through medical shots, pills and patches.
Art
Ann Liv Young - New York-based performance artist sells used tampons in a clear plexi-glass box
Riekje Louise Jongsma is an Amsterdam-based artist who makes silk sanitary napkins.
Seeing Red - photography exploring menstruation by Anna Gibson and Johanna Samuelson
Menstrual Blood Art - flowing images created with menstrual blood by artist Vanessa Tiegs
Menstrual Pinups - like Duchamp drawing a mustache on the Mona Lisa, anonymous Readymade artist Photoshopped these famous pinups to visibly show their menstrual flow
BLOOD - menstrual paintings by Tinet Elmgreen
A Legitimate Vagina - Is feminism irrelevant in art?
Sociology and Philosophy
Menstruation and Body Literacy - article on Psychology Today that explores gender biases, shame and education
Bloody Women and Bloody Spaces - essay on menstruation in Judaism and Christianity
Why is Period Porn So Rare? - basis for a talk given at the World Pornography Conference
Not Now, I'm On My Moon - School of Tantra teaches that making love on a woman's period is sacred
Going with the flow - article by Roberta Carwin tackles practicalities of lovemaking during menstruation
Menstruation and Sex - article on The-Clitoris.com
Menstruating Idol of Goddess Parvati - origins of Hindu Goddess menstruation ceremony
Heal the Planet with Menstrual Blood - call to ritually pour menstrual blood on the earth
Menstruation Rituals - from ancient to modern times
Is Menstruation Obsolete? - critique of Elsimar M. Coutinho's study promoting cessation of menstruation
Poetry
Ode to my Period - anonymous post on craigslist bemoaning her late period
Menstrual Dreams - erotic poetry by K. Brittany Fedorev Vanderkleed
Period Products
DIY Cloth Pads Tutorial - step by step instructions on how to make your own menstrual pads, with photo illustrations
No-Sew Menstrual Pads - ideas for making cloth tampons and menstrual pads out of everyday household items
Pandora Pads - organic cotton pads I use on my period
Jade and Pearl - sea pearls natural sea sponge tampons
Lunapads Founder and Flow Lover - Feministing interview with Madeleine Shaw
Natracare - organic cotton tampons, pads and panty liners I occasionally use; great site, check out the Monthly Matrix for a Flash animated day by day what-to-expect throughout a woman's monthly cycle
The Adventures of Gynomite Girl - a woman's review of alternative products for menstruation
The Rags: Paraphernalia of Menstruation - Powerhouse Museum exhibit of menstrual products
Tech Resources
Period Tracker iPhone App - calendar to predict fertile dates and upcoming period; also allows me to enter intimate dates. There is a text field above the "Intimate" toggle so I can make notes, like if I'm having multiple partners during that intimate time.
Fertility Friend iPhone App - calendar to predict fertile days and next month's period; also a great app for documentiing when I have sex (protected or unprotected)