Pure Java Type 4 MS Access JDBC (1.2, 2.0, 3.0, 4.0, 4.2) Drivers for MS Access
Free
GSpread.NET — fast and easy to use open source library for Google Spreadsheets.
ODBC Driver for SQL Azure
Robust and easy-to-use SAML Toolkit to create and manipulate SAML documents
CrococryptLib: The easiest way to integrate encryption into your application
Powerful 1D and 2D barcode generation report item for SSRS