Mac OS X: Sparrow, one of our favourite Mac desktop email clients, continues its quest to rid the world of email attachments. In addition to using CloudApp to send file links, you now have the option to send files through Dropbox.
By using Dropbox to attach links to files in Sparrow, you don't have to worry about file attachment sizes any more. Drag the files you want to attach and they're uploaded and synced to Dropbox; the recipient gets a link to the file for downloading.
Sparrow 1.5 also brings speedier search to your inbox and the ability to block images to help control spam.