Downloading the Confluence 2.6.1 standalone version from the following website:

http://www.atlassian.com/software/confluence/ConfluenceDownloadCenter.jspa

Unzipping the zip file, only provides the following files and directories:

07/19/2007  11:25 AM    <DIR>          bin
07/19/2007  11:25 AM    <DIR>          conf
11/14/2007  09:31 AM    <DIR>          confluence
11/14/2007  09:31 AM    <DIR>          licenses
11/14/2007  09:26 AM             2,895 README.html
11/14/2007  09:26 AM             1,958 README.txt

From the website, it states that the zip file is estimated to be 56MB of size. However, the downloaded zip file are only 50.2 MB (52,735,961 bytes) instead.