grep - grep is a command-line utility for searching plain-text data sets for lines matching a regular...

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.

PowerGREP - Quickly search through large numbers of files on your PC or network using powerful text patterns to find exactly the information you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...

PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request

dnGREP - dnGrep allows you to search across files with easy-to-read results.

Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents