CLEO plugins are dynamic libraries with the .CLEO extension. At startup, the CLEO library scans the CLEO folder for the .CLEO files and tries to load them. In case of success the plugins begin to work and do what they were made for.
Plugins are installed in the same way as scripts. To install a CLEO plugin you need to copy the .CLEO file to the CLEO folder.
To remove the plugin, just delete it from the CLEO folder.
See the Download section for some of the available CLEO plugins.
CLEO 4 allows to make new opcodes using sources of the CLEO SDK. The starter kit contains three examples of such plugins: