Because I'm delay addict, these are just my favourite delay fx
concrete fx tape delay (perfect)
2warp delay (and many more great experimental fx
http://dsp.mutagene.net/
Retro delay (aaaaah!)
www.e-phonic.com
Ixox Delay
http://ixox.net/ixoxdelay.html
Analog Delay (
http://www.smartelectronix.com)
P1 tape delay