We skipped over this, but for anyone who needs to manage data about lots of resources in different formats (eg books, links, PDFs, journal articles), Zotero is a very powerful free tool which grabs bibliographic data or metadata from anywhere and manages it for you. Can output bibliographies in all the usual styles. An alternative to EndNote or RefWorks.
Paid iPad app ($5) which provides the index card functionality of Scrivener and integrates with it. So you can plot and scheme on your iPad, and then synch it with your larger project in Scrivener.
'"I have read and agree to the Terms" is the biggest lie on the web. We aim to fix that.'
Community does the hard work of reading all the terms and conditions small print, then rates the service and points out key issues for each.
Like Dropbox, stores and synchs your files on both your machine and in the cloud. Also provides you with Google Docs (like Microsoft office products), great for collaborating with others on documents in real time.
For Chrome users, an extension to block out those enticing sites that distract you (this is the one I use). if you accidentally try to access a blocked site, you get a message: shouldn't you be working?