Avenir in action on forestapp.cc

Under the hood

.content-1 { font-family: "Avenir LT 45 Book", "Century Gothic", proxima_nova, "Helvetic Neue", Helvetica, Arial, sans-serif; font-size: 45px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; color: #FFFFFF; }
.content-2 { font-family: "Avenir LT 45 Book", "Century Gothic", proxima_nova, "Helvetic Neue", Helvetica, Arial, sans-serif; font-size: 26px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; color: #FFFFFF; }

Avenir is available from Fonts.com and MyFonts.