Docxpresso API Core is a PHP library that allows to generate beautiful documents in any format: PDF, Word, ODT and RTF out of HTML+CSS and docx/odt templates. You may generate truly sophisticated documents with a few lines of code. Docxpresso is very fast: you can generate close to 1 million documents of Word documents per hour in a reasonably powerful web server. You may download a fully functional free Trial and just update to a full license whenever your development period is completed. Docxpresso is free for charities and non-profit organizations.