Files with appzip extension can be found as resource app packages within IBM BAR archives, which are used to deploy IBM software solutions.
APPZIP file extension - IBM app resource package
What is appzip file? How to open appzip files?
File type specification:
File extension appzip is used for one of the formats in modern IBM software solutions.
According to IBM website, a typical .appzip file contains all resources that belong to the application, such as .msgflow, .cmf, .esql, .map, .xsd, and any message set .dictionary and .xsdzip files. If an application refers to one or more libraries, .libzip or .shlibzip files for the referenced libraries are also added to the .bar file.