The development for InvoicePlane 2 started again but this release will differ from the announced one.
InvoicePlane 2 will be a partly-rewritten version of InvoicePlane with some new features that really need to be implemented. The new IP 2 will be based on CodeIgniter 3 so we do not have to rewrite everything and can take a lot of code directly from the ‘old’ application. But I planned to make this version much better than before.
Read more in the original blog post.
This is the discussion thread for the blog post.