மின்தமிழ் - join
Tamil in Digital Media is aimed at IT professionals, academics, individuals and institutions committed to preserving tamil heritage materials in Digital media. This group encourages broad based discussions on the working of 'Tamil Heritage Foundation' (http://www.tamilheritage.org) mission.
Low activity, 842 members, moderated, restricted

திருவண்ணாமலை - join
only posts on lord shiva, nayanmars, siddhas, ayurveda and articles related to shaivism should be posted.
Low activity, 96 members, restricted

அழகி (Azhagi) - join
Azhagi - A Unique (natural, intuitive and easy Tamil transliteration in ALL applications - since 2000) Tamil Transliterator. More details on Azhagi's uniqueness at easy.azhagi.com Auto/Reverse/DualScreen Transliteration, Transliteration in Hindi & More... Azhagi (azhagi.com) - 100% FREE
Low activity, 783 members, moderated, restricted