BulkPDF is a free and easy to use open source software, which allows to automatically fill an existing PDF form with differen values. Only a spreadsheet (Microsoft Excel 2007/2010/2013, LibreOffice or OpenOffice Calc) with the desired values is required.
Fixed small issue where column names starting with the same name will incorrectly select which column to use for the output.
Example Spreadsheet: Column 12 | Column 1
Example PDF: Field_1 Column 1 <- This will select "Column 12" because it begins with "Column 1"