Our ability to help you is constrained by Linux Questions rule "
Posts containing information about cracking, piracy, warez, fraud or any topic that could be damaging to either LinuxQuestions.org or any third party will be immediately removed". I guess that applies to getting around the download restriction that Oracle have applied to Guest Additions.
EDIT:
I am sorry that you have had this problem
Yes -- there are other VM products but IDK them so will leave others to answer that part.