Jsirssi is a project mainly written in C, it's free.
JavaScript for the Irssi IRC client
This isn't very useful yet. So far you can load scripts, scripts can load scripts, scripts can load interfaces (like "irssi"). The only interface available so far is "irssi", which lets you bind and unbind commands.
== Commands ==
/js exec
On startup, a module is created called "
/js open