There are meeting signin apps.
Apps to let you write on a pdf.
PDF Expert – the PDF handling app for the iPad. "It allows you to markup documents with highlights and handwriting, insert text and stamps, sign and even merge PDFs."
iAnnotate – turns your tablet into a world-class productivity tool for reading, marking up, and sharing PDFs, Word documents, PowerPoint files, and images. Has a secure document edition designed for corporations.
"ixelpoint technology allowed us to shrink the stylus tip size down to 1.9mm; 70% smaller than the nearest competition. While fingers and rubber styluses feel more like markers or crayons, Pixelpoint helped create a true digital pen. The tip’s material was hand-picked to mimic the drag of a pen on paper, giving you more control and better expression in every stroke."
You could look into
From what I read snappii has a forms creation facility on the web. Once create the from, you download the app somehow.