I've written a couple of addons for my installations of IPFire.  They're available on github and some other people have tried them; they seem to be fairly well received and it's been suggested that it may be worth making them available through pakfire as official addons.

The first addon provides the ability to send status emails. You can define multiple schedules and the items to be included in each email.  By choosing parameters carefully it's possible to get it to send emails on some error conditions.  The emails can be encrypted with GPG.  The architecture makes it easy to add further items to be reported on.

The second addon handles the setting up and updating of IP Address Blocklists in the firewall.  It includes options to select which lists to use, and some control over how frequently to check for updates.

Both include WUI pages for configuration and language files.  They're fully functional, but would require some checking and minor updates.  The source can be seen at https://github.com/timfprogs .

I'm aware that there other people have made addons for both these purposes, which maybe suggests that it's functionality that is worth adding.