General term for any stiff outer covering of a unicellular protist, and usually made up of interlocking plates. dinoflagellates and diatoms are examples of protists with thecae.
Theca is dynamic classpath container plug-in for Eclipse Java projects. It manages project classpath by adding all *.jar and *.zip files from a specified project folder and what's more importatnt automatically attaches source code and JavaDoc.