Shrink Me - Compress images with one drag / click
PlutoPDF - A URL to PDF converter wrapped behind a simple API.
TinyJPG - Compress JPEG images with perfect quality and file size
Bitwar Online PDF Converter - One-click to Interconvert PDF to Word, Excel, PPT, PNG, TXT, HTML, etc., batch mode supported!
Watermark.ink - Online Photo Watermarker
Pdf.to - Convert PDF to Word, Excel, JPG, & from. Also compress PDF