Controls4J Library is a set of improved graphical controls for the Java/Swing.
Free
Used to test your computer's Unicode support
Java library for converting 50+ document types to PDF and raster images
ODBC connector to SQL Server database for Windows, Linux and Mac OS (32/64 bit)
.NET merge / diff library for comparing PDF and Office documents.
Automates the process of Image Stamping Multiple PDF files
How to Interconvert any of the Java primitives. Conversion Amanuensis.
.NET library for building comprehensive electronic signature applications.