CCAIN is a lightweight component framework written entirely in C and
inspired by the Common Component Architecture (CCA) component model.
The CCA-Lite effort (of which CCAIN played a small role) has been
revised and is now focused on automation of code generation and manipulation
tools. These tools are known as the CCA "Onramp" project, with a goal of
helping kickstart new users into the CCA world with minimal pain and
confusion. Onramp will be available from the SciDAC Outreach
CCAIN may still be of interest to people who seek a minimal C framework
for component programming, so check
it out if you're curious.