Here is a list of all the Marasites that I feel may be of use to you. If you have a Marasite or know of a Marasite you think should be on the list, then Contact me.
General Help (Missions, temples, FAQs, Avatars etc):
MaraGuides - Avatars
Candys Marapets Guides
Coding/HTML/club layout/Marasite help:
Mr Peas Marapets Trading Guide