Etherpad and its mirrors:
http://ietherpad.com/wikileaks
http://etherpad.mozilla.org:9000/wikileaks (primary site)
http://piratepad.net/wikileaksmirrors
http://typewith.me/wikileaks
http://sync.in/wikileaks
http://primarypad.com/wikileaks

Official site:

http://www.wikileaks.org/ (unreachable)

IP mirrors

http://46.59.1.2/
http://213.251.145.96/

DNS mirrors

http://ljsf.org/
http://wikileaks.nl/
http://wikileaks.ch/
http://wikileaks.pl/
http://wikileaks.de/
http://wikileaks.eu/
http://wi.kileaks.com/
http://wikileeks.org.uk/
http://wikileaks.eu.org/
http://wikileaks.jmp.net/
http://wikileaks.dd19.de/
http://sunshinepress.org/
http://wikileaks.goulag.su/
http://wikileaks.fs-cdn.net/
http://wikileaks.dotnul.org/
http://wikileaks.no-ip.co.uk/
http://wikileaks.showeb.net/
http://wikileaks.rfc1149.net/
http://wikileaks.pokapok.net/
http://wikileaks.bortzmeyer.fr/
http://wikileaks.catsinheat.net/

Proxy/Cache mirrors

http://46.59.1.2.nyud.net/
http://213.251.145.96.nyud.net/
http://88.80.13.160.nyud.net/
http://79.159.1.172/wikileaks/
http://savewikileaks.dyndns.org/
http://cablegate.failar.nu/
http://tos-proxy.appspot.com/www.wikileaks.org
http://happyspancer.appspot.com/www.wikileaks.org/
https://proxybay2.appspot.com/wikileaks.org
http://wikileaks.org.nyud.net/
http://mirror.wikileaks.info/
http://cablegate.underlandet.org/
http://www.privetbank.com.ua/cablegate/index.html
http://w5.wavemx.com/sggk/drprovzph.lit/?wavemx=0
http://keiths-proxy-server.appspot.com/wikileaks.org

I2P mirrors

http://jogging.i2p/owiki/
http://thaileaks.i2p

Tor routing (http://www.torproject.org/)

http://www.suw74isz7qqzpmgu.onion/
http://gaddbiwdftapglkq.onion/