Photoshop CS plug-ins

Anyone have a list of 'must-have' plug-ins for photoshop CS? Or use any realy cool Photoshop CS plug-in that they would recommend?

Currently I have Dfine and PhotoOptics and I'm looking to play with some other ones.

Not plug-ins but I can highly recommend Roger Cavanagh's (and Paul Jaruszewski) Variations Suite series of scripts and actions.

I've been using them for a while (for free, just go and download them) but have just paid a donation for the "Plus" versions of the whole lot. Best money I've spent on software when it comes to photo work.

I can't get enough of the Velvia script (I used to shoot Velvia film when I used to mainly use film). I do a lot of landscape shots and here is where Velvia comes into it's own. It really lifts a fairly good landscape shot into something really special.

The B+W script means I don't have to do anything else to great black and white conversions. Say no more.

Temperature variations also is a really handy tool and much better than the standard CS "Photo Filter" tool.

I've only just started to play with the other scripts (seven in all, so far) and they all look really good as well.

I would recommend everybody to at least take a look at these scripts. It is obvious a lot of work has gone into them and they are constantly being improved.

Cheers

Ian