Alright Sans in action on greenhousego.net

Under the hood

.header-1 { font-family: AlrightSans; font-size: 12px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 16px; text-transform: none; color: #FFFFFF; }
.header-2 { font-family: AlrightSansBlack; font-size: 14px; font-style: normal; font-weight: 300; letter-spacing: 0px; line-height: 26px; text-transform: uppercase; color: #FFFFFF; background-color: #605DAC; }
.header-3 { font-family: AlrightSansBlack; font-size: 14px; font-style: normal; font-weight: 300; letter-spacing: 0px; line-height: 26px; text-transform: uppercase; color: #FFFFFF; background-color: #76A04E; }
.header-4 { font-family: AlrightSansBold; font-size: 60px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 66px; text-transform: none; color: #FFFFFF; }
.header-5 { font-family: AlrightSansThin; font-size: 29px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 39px; text-transform: none; color: #FFFFFF; }

Alright Sans is available from Webtype.