Free Productivity Tools
Documents, Presentations & Spreadsheets
Google Docs: This website has online equivalents to all Microsoft Office programs, but you can access your files from anywhere you can get online. You can also "share" files with others for group collaboration. Recognizes all Microsoft Office formats. Say goodbye to your flash drive!
Open Office: If you don't always have access to the internet, this website has down-loadable equivalents to all Microsoft Office programs, but you can access your files from anywhere you can get online. You can also "share" files with others for group collaboration. Recognizes all Microsoft Office formats.
Bibliographies
Bibme: This website creates bibliographies for you in MLA and other formats. Just input key data (or have it find it for you) and it will autofill the rest. You can create a perfect bibliography ready for printing in just minutes.
Mindmaps & Process Charts
Webspiration: This online tool creates mindmaps, flow charts and process charts. Like Google Docs, you can collaborate with others.
Surveys
SurveyMonkey: This website allows you to create free, professional online surveys in a variety of formats with excellent analysis tools that save you time doing the math and graphs to analyze your results.
References
Synonym.com: A synonym-finder tool.
Dictionary.com: It's a dictionary.