Belov Software Shareware utilities for Btrieve. http://bsl.com.ru/

Classic Software, Inc. Software components and programming tools for Btrieve, including the Classic Data Control for Btrieve and DDF Maker, a utility for editing Btrieve data dictionaries. http://www.classicsoftware.com/

Nelson Software Solutions - btsearch Export and import Btrieve data including utilities to edit DDF files or to analyze your existing files or create them. http://www.nssdd.com/btsearch.htm

Aardvark Communications Solution which can replicate heterogeneously between various relational database platforms. http://www.aardvark.on.ca/pd/replicate.html