The popular citation generation tool EasyBib recently released a free iPhone and iPad application. Probably the neatest aspect of the EasyBib app is that users can scan a book's or magazine's ISBN barcode to record the information necessary to create a proper citation. Users can add citations on the app and email those citations to themselves from the app. (from Free Technology for Teachers)
Free Technology for Teachers continues to be a go-to blog for resources for education. Even if you don't use the particular resources featured there, you can get a general sense of what technology is available just from checking out the blog regularly.