This is a free online conversion tool to KML offered by AcuGIS. You can convert ESRI shape files, MapInfo, KML, and other formats.
See the Input Format:* drop-down at right for supported file types.
Over-ride Source SRS
Re-project or transform to provided SRS
Over-ride Name Field
relativeToGround, clampToGround, or absolute. The default is relativeToGround.
Restricted WHERE (like SQL). Second field is attribute