What plugins are included in your plugin suite?

We purchase plugins for our plugin suite based on plugins that have an unlimited license. We do this because we want to have a tool we can install across all of our client sites for one single fee to us per year. So if the plugin/tool a one-off purchase, it most likely is not in our plugin library. We can always consider adding new plugins to our library but they would need that unlimited license so we can give all clients access at one cost.