Most of the products or websites listed below are ones which I have personally used and recommend. I do not know any of the authors whose websites or blogs I’ve listed but am sharing them because I’ve found them to be so helpful.
SOFTWARE
Snowflake Pro – useful for planning your novel
From Literature & Latte (with free trials available):
*I have no personal experience of One Stop since rather than being able to purchase the software outright, it requires an annual paid subscription (something I avoid due to personal dislike) but am including it here because it was created by the same people behind Writers Helping Writers
WEBSITES
Helping Writers Become Authors
NaNoWriMo (National Novel Writing Month)
SFWA (Science Fiction Writers of America)
SELF-PUBLISHING
Bublish (although I haven’t used its publishing services, I’ve subscribed to the newsletter and there are regular free web seminars)
Tax Info for Kindle eBook Publishing (Many thanks to Nancy Mitchell and Mia for this suggestion)
SUBMISSIONS/CONTESTS
Dark Markets (market listings for horror writers, free)
Duotrope (after free trial period, membership costs US $5/month, or save with an annual subscription)
Ralan (short story market listings, free)
Writing Career (free)