Similar to ソーシャルノートブック

.fi

.fk

.fm

.fr

FREAK

Fussballdaten.de

Romeo (social network)

.gf

.gg

.gh

.gi

.gl

.gn

Goodreads

Google Currents (social app)

Gopher (protocol)

.gp

.gs

.gt

.gu

H2O (web server)

HD-PLC