Intype is new and it’s just in Alpha state and recently version 0.2.1 was released that offers undo/redo and drag&drop. It curently lacks tabs but I think they will be introduced in the next version because it’s the more requested feature. It also adds Perl, Python, YAML bundles and new snippets for the C bundle.
I use Intype with Ruby on Rails development because bundles speeds up writing a lot and it’s the best replacement for TextMate (I wish I had a Mac). I still evaluate it and RadRails but I think I’ll go with Intype because it’s faster and smaller.
Speaking of tabs a user made Intype Project Manager that acts as placeholder for Intype windows, has a file browser and support tabs.