AppBrain
Trigger: !appbrain
Try it
Kagi would openhttps://www.appbrain.com/search?q=ubuntu+iso
Run @appbrain in Kagi for Kagi's own results from www.appbrain.com only
URL pattern: https://www.appbrain.com/search?q=query
Searches www.appbrain.com, filed under Downloads.