Architects
Barefoot & Gilles Architects (UK) http://twitter.com/subutcher

Construction
Air Improve Limited (UK) http://twitter.com/airimprove
Schumacher Tile & Stone http://twitter.com/schumacherts

Homebuilding
Fresno Homebuilding / LENNAR http://twitter.com/lennarfresno
Goshen Timber Frames http://twitter.com/GoshenTF
LENNAR http://twitter.com/lennar

Real Estate
Fabienne Malenfant (agentsparsecteur.com - Québec) http://twitter.com/mafamal
Enormo (Enormo.com): http://twitter.com/enormo_com
Enormo (Enormo.uk): http://twitter.com/enormo_uk
HomeNet Cafe: http://twitter.com/homenetcafe
Immonet (de) http://twitter.com/immonet
Lewke Partners of Prudential First Realty http://twitter.com/lewkepartners
Meritage Homes http://twitter.com/meritagehomes
Nuroa.de http://twitter.com/nuroade
OptHome http://twitter.com/opthome