Welcome on the project page of pdfcomment.sty
For a long time pdfLaTeX has offered the command \pdfannot for inserting arbitrary PDF annotations. However, the command is presented in a form where additional knowledge of the definition of the PDF format is indispensable. This package is an answer to the – occasional – questions in newsgroups, about how one could use the comment function of Adobe Reader. At least for the writer of LaTeX code, the package offers a convenient and user-friendly means of using \pdfannot to provide comments in PDF files. Since version v1.1, pdfcomment.sty also supports:
LaTeX → dvips → ps2pdf, LaTeX → dvipdfmx and XeLaTeX
Unfortunately, support of PDF annotations by PDF viewers is sparse to nonexistent. The reference viewer for the development of this package is Adobe Reader.
If you are interested in older version just use the 'Downloads' tab!