Here are the latest incremental updates for Mac OS X apps:

Clarkwood Software has updated Multisite (http://clarkwood.com/multisite/), a Mac OS X utility for users of iWeb, to version 3.1. The upgrade lets you quickly find sites by name, offers full support for keyboard navigation, and lists the number of sites shown and total site count.

Publicspace (http://www.publicspace.net/) has announced Vitamin-R 1.82, an update to its productivity tool that breaks down large, vaguely defined tasks into a series of short time slices of between 10 and 30 minutes, each with specific objectives. The upgrade provides optimized graphics for the new Retina Display-equipped MacBook Pro models.

Vortimac Software (http://www.vortimac.com/) has released Memoir 2.1, an update to their personal journal for Mac OS X. The upgrade brings Mac “sandboxing,” 64-bit support, export and printing enhancements, encryption and locking updates.

Layer Cake, an OS X app from MacRabbit (http://www.macrabbit.com) for helping build websites and apps form Photoshop designs, has been revved to version 1.1. The upgrade sports a “Magic Retina” feature that lets you, for instance, design 1x graphics and automagically builds high-quality Retina 2x versions.