Eventpubsub-boxee is a project mainly written in Python, it's free.
Boxee EventPubSub App Stub w/ Twilio Example
Installing the EventPubSub Example:
Step 1:
vi ~/Library/Application Support/BOXEE/UserData/profiles/
Step 2: Extract the contents of the zip into ~/Library/Application Support/BOXEE/UserData/apps/eventpubsub cd ~/Library/Application Support/BOXEE/UserData/apps/ unzip ~/Downloads/eventpubsub.zip
Step 3: Open Boxee and hit escape to see the shortcuts menu You should then see a Twilio icon, click that. You'll see a black screen when its started. Now start playing a video. You should now have messaging overlay during your playback.