This is the tool I use most often for collaborating with others. We've been using it a lot to organise CPD23, with Word docs for planning who on the team was doing what and when, and a big big big spreadsheet of everyone taking part. Just thinking about how big that spreadsheet is makes me so thankful for Google Docs! There are well over 700 people taking part, imagine if we had to manually add these to a spreadsheet? I love living in 2011 :)
I also use Google Docs if I'm going to be working on something at home and at work, or if it's the sort of thing I'm going to want to add to whenever I get a bit of inspiration. There is an app which I have downloaded for my phone, but I use this to read Docs rather than write them mostly, as I find typing on a phone keyboard fairly tedious.
|No more of this! Image by Craft*ology on Flickr|
As Jen says, the graduate trainees in Cambridge use a wiki to collaborate on our group website, CATALOG. Since there are seven of us managing the website, we keep a rota, keep a note of changes we have made or need to make, and upload backup files to a password protected wiki. Our wiki is hosted on the university's VLE, and while it doesn't look particularly pretty, it does the job well. Apart from this and my little contributions to the Library Day in the Life Project, I don't use wikis that much. However, I've seen some nice examples of pages set up for particular courses at the university. One example which I liked and thought could be used in a library setting was where a lecturer uploaded the reading list for a course, and then got the students to edit it, annotating, adding their own suggestions and striking out any resources they didn't find useful.
So while I use all three of these tools, I don't actually use Dropbox for collaboration. We aren't allowed to install it at work, but as I never find myself needing to share large files I don't see it would add much to my work-life even if we could. Perhaps when I'm doing my Masters next year it will be handy for sharing presentations etc., although Google Docs can be used for that anyway! Much the same with Wikis - I don't use these in any particularly exciting way...yet?