Imboon

Small vegetarian restaurant in the Klong Kwang area of Nong Khaem district Bangkok.
Open from 6am -6pm Monday to Saturday. Closed on Sundays and Buddhist Days(Wan Phra).

Maprang

http://www.bangkokpost.com/feature/people/33604/manna-from-heaven

Interesting article about some of the lesser known fruits of Thailand.

Meetup

http://www.meetup.com/Bangkok-Raw-Meetup

Bangkok Vegetarians

http://www.bangkokvegetarian.org

Herwin's

http://www.herwinsvegancafe.com/index%20english.html

Closed for the month of September.

Moving to Surawong Road in October.

In English

At the Mall

The Vegetarian Festival at the Mall. 16-26 October.