4D, Inc. has announced 4D 6.8, a Carbonized version of its database and Web development software. Version 6.8 also brings a number of other enhancements, including improved security, better TCP/IP integration, and interface enhancements through Aqua under Mac OS X. 4D 6.8 will be available as a free download on Wednesday, April 17, to version 6.7 customers.