[Avalaxy]

http://www.theverge.com/2015/8/27/9210475/russia-wikipedia-b...

http://uk.businessinsider.com/russia-bans-reddit-2015-8?r=US...

http://techcrunch.com/2014/12/03/github-russia/

[vbezhenar]

I'm not sure about reddit, but wikipedia and github are not banned currently. Internet censorship is worrying and might eventually ban an important sites, but not yet.