XRumer 7.7.35 ELITE is the best soft for mass posting.
+ automatically register profiles, edit profiles, make topics/replies on forums + automatically confirm links in e-mails (and auto-register email accounts for that!) + automatically break captchas during registering and posting (only XRumer 7.7.35 can break more than 150 types of captchas, included ReCaptcha and flash-captchas) + XRumer recognize and answer the antibot-questions (like "2+2=?", "What is capital of England?", etc.; ONLY XRumer 7.7.35 have answers on more than 70.000 antibot questions!) + this program has unique intellectual mode "Antispam": its a spesial thematic posting + automatically update and check proxy-lists for 100% anonymity + its works withs blogs and social networks + "Mass-PM" mode make mass posting personal messages to ALL members of ALL forums simultaneously + there are lot of articles about XRumer on recourses with high reputation: "Washington post", "WikiPedia.Org", "Sophos Labs", "Symantec" + monthly updates increase powerful of this software everytime, XRumer has a 7-years history
And, by the way, XRumer price will be officially increased up to $650 in 5 january 2013, with new important functions.