"[P]rovides a one-stop mechanism for access to standards that have been incorporated by reference in the U.S. Code of Federal Regulations (CFR). These standards incorporated by the U.S. government in rulemakings are offered at no cost in “read only” format and are presented for online reading. There are no print or download options." "All users will be required to install the FileOpen plug-in and accept an online end user license agreement prior to accessing any standards." - ANSI IBR web site.
NISO (National Information Standards Organization) standards are available for free. Search or browse by name and designation. These technical standards are related to publishing, bibliographic and library applications.