Sri Ramanasramam
Dedicated to Bhagavan Sri Ramana Maharshi, regarded by his disciples as a Master of Jnana Yoga. Enter "devotee" sites like this with caution.
The Divine Life Society
Rather than list all of the free books provided by this society, a link to their web site is given instead for you to visit. These and similar books on the Web are of varying length and quality.
Dream Hawk
This man has written many books about dreams, sex, yoga and health. He is the author of Yoga and Childbirth listed above. Some of these books are published online now that they are out-of-print. You might like them.
Manybooks
Some of Yogi Ramacharaka's other books are here, including the Raja Yoga and Jnani Yoga books. I cannot attest to their quality and reliability since I discovered them only recently.