HARRISTYPE  Absolutely love this. Played with the demo and instantly bought it. The control over grid, borders, size, cropping, rotation, and rollover effects makes this one of my most valuable RapidWeaver plugins.  
(Version 2.0b1)

RPPHOTO  Takes RapidWeaver from the "best of" category to an even higher level. This one is created by the God of RapidWeaver plug-ins; all the plug-in and theme makers around the world working with RapidWeaver are one of the most creative and productive groups I've ever imagined. These are the people that make RapidWeaver extra-special.  
(Version 1.5)

JKT  Indeed a very good addition to RW, but it isn't without problems:

1. No ability to drag and drop images to the interface and no ability to add more than one image at a time. (2 points off the ease of use).

2. No way to add a text field for explanatory text (e.g. "the photos are of the family on holiday..." or "this is our catalogue of products"

3. No way to modify the direction or intensity of the shadow or reflection

(2+3 - 1 point off features).

However, what it does do, it does very, very well.  
(Version 1.4)

THEMACJEDI  This is a plug-in that was missing from Rapid Weaver. It creates something that was missing, the ability to create cool clickable links. You might have to use it to fully understand but you won't be sorry. Columns is also awesome.  
(Version 1.4b3)