PDFCrowd - Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.
Select2 - Select2 offers customizable select box with support for searching, tagging, infinite scrolling, and many other used options.
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Selectize.js - Selectize is a custom <select> UI control with autocomplete and native-feeling keyboard...
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Chosen - Chosen is a JavaScript plugin that makes long, unwieldy select boxes much more user-friendly.