jTDS is released under the terms of the GNU Lesser General Public License. A copy of the LGPL is provided in the LICENSE file. The LGPL is sufficiently flexible to allow the use of jTDS in both open source and commercial projects.
TDS is an open source 100% pure Java (type 4) JDBC 3.0 driver for Microsoft SQL Server (6.5, 7, 2000 and 2005) and Sybase (10, 11, 12, 15). jTDS is based on FreeTDS and is currently the fastest production-ready JDBC driver for SQL Server and Sybase.