Errbit: The open source self-hosted error catcher
Errbit is an open source, self-hosted error catcher. It is Hoptoad API compliant so you can just point the Hoptoad notifier at your Errbit server if you are already using Hoptoad.
Errbit may be a good fit for you if:
Your exceptions may contain sensitive data that you don't want sitting on someone else's server
Your application is behind a firewall
You'd like to brand your error catcher
You want to add customer features to your error catcher
You're crazy and love managing servers
If this doesn't sound like you, you should probably stick with Hoptoad. The Thoughtbot guys offer great support for it and it is much more worry-free. They have a free package and even offer a "Hoptoad behind your firewall" solution.
These details are provided for information only. No information here is legal advice and should not be used as such.