The following is a list of ADHD websites and resources: 

Websites:
CHADD.ORG  - Children and Adults with Attention-Deficit/Hyperactivity Disorder (CHADD).  CHADD is an organization that provides education, advocacy, and support for individuals with ADHD and their families.
ADD.ORG - Adult Attention Deficit Disorder Association -  A website dedicated exclusively to helping adults with ADHD to live better lives.
UNDERSTOOD.ORG - Understood is a nonprofit that provides resources and support to people with ADHD and those who learn and think differently so they can thrive in school, at work, and throughout life. 
ADDITUDEMAG.COM - Information & support for families and individuals living with ADHD.
WRIGHTSLAW.com - Information about educational advocacy for ADHD and ADHD accommodations for children in the public school system.

Books:
You Mean I'm Not Lazy, Crazy, or Stupid? - by Kate Kelly & Peggy Ramundo
ADHD After Dark - The book outlines key principles for a great sex life for couples with ADHD and offers strategies and treatment interventions where specific issues arise.

Podcasts:
ADHD for Bad Ass Women - Tracy Otsuko - Upbeat, positive podcast for Adult Women with ADHD 

Mindfulness Apps:
Headspace
Buddhify
Calm