Homer Conferencing - Homer is a free cross-platform SIP softphone with video support.
pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
Double Text - Cheeky Facebook messenger analyzer
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
MyLab - Break through to improving results with Pearson's MyLab & Mastering. We're working with educators and institutions to improve results for students everywhere.
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents