GnuSocial Clients:
For desktop:
- Gwibber http://gwibber.com/ (GTK)
- Choqok http://choqok.gnufolks.org/ (Qt)
For shell:
- GnuSocialShell (coded by me): http://gnusocialshell.amayaos.com/
- Identicurse https://github.com/identicurse/IdentiCurse
- Gitn http://linuxinthenight.com/ (By @fanta )
For Android:
- AndStatus: http://andstatus.org/

Of course there are a lot of clients: http://wiki.gnusocial.net/doku.php?id=clientes_de_gnusocial
cc/ @alijee