There is no need to capture certain plugins… Basically, in the last 6 months, a few of the members on here How can we improve KANBOARD Plugins information? discussd in this threead pushed my frustration with plugins into creating the PluginManager.
The goal was to provide better accurate information about plugins and support non-technical users so they can use Kanboard to its full potential.
If any plugins are not listed but you have found them and they work/are usefull but not updated in a long time (over a year), then the idea is to slowly list them in the Manual Plugins page, but the plugins must serve a need. I have seen many plugins for Kanboard where the plugin is half complete and doesnt work at all.