Pretty hardcore implementation of something similar to PlayPen. Provides a bunch of layouts, font options, skins etc.

Welcome to Evernote

http://preview.evernote.com/

Interesting “memory device” that has awesome hand writing recognition, can read pictures etc, and then provides search so you can find things easily.

Thumbtack Press · So Hip it Hurts

http://www.thumbtackpress.com/browse/

Thumbtack Press · So Hip it Hurts

Awesome prints from pop/modern artists.

Subpage Listing « WordPress Plugins

http://wordpress.org/extend/plugins/subpage-listing/#post-292

Subpage Listing « WordPress Plugins

Subpage Listing allows you to take full advantage of WordPress Pages’ hierarchy by generating a navigational tree of the pages below them (subpages).

Rapleaf: Reputation Lookup and Email Search

http://www.rapleaf.com/apidoc/v2/abook

Rapleaf: Reputation Lookup and Email Search

“The Address Book Reader returns the names and email addresses of the contacts in a webmail address book.” Simple API for loading people’s address books and then using that for invites etc.

Smarter Archives « WordPress Plugins

http://wordpress.org/extend/plugins/smarter-archives/

Smarter Archives « WordPress Plugins

This plugin provides you with a template tag for your archives page, which presents navigating the archives in a unique way. It has a row for each year with posts, and every month in that year with posts has a link to the month.