File Sharing

Google Docs & Spreadsheets is a web-based editor that allows you to create text documents and spreadsheets. You can easily do all the basics, including making bulleted lists, sorting by columns, adding tables, images, comments, formulas, changing fonts and more. Google Docs & Spreadsheets allows you to upload your files and make changes to them online. It accepts most popular file formats. It is possible to invite people and work on files collaboratively; additionally, you can publish your documents and spreadsheets online with one click, as normal-looking web pages. Free to use.

Use a Box to collaborate on documents. Secure access to up to 15GB of storage. Perfect for small teams and professionals. Manage multiple Box accounts within a company or organization. Share folders between Boxes and enable collaboration. 

Online storage service, integrated with your desktop. Automatically syncs chosen folder with other machines. DropBox lets you upload any type of file, as long as it is smaller than 350MB. DropBox uses Amazon's S3 service as its storage solution and provides its users with 2GB of free storage. Supports Windows XP and Vista, Mac OSX, and Linux.

Amazon S3 provides a simple web services interface that can be used to store and retrieve any amount of data, at any time, from anywhere on the web. It gives any developer access to the same highly scalable, reliable, fast, inexpensive data storage infrastructure that Amazon uses to run its own global network of web sites. The service aims to maximize benefits of scale and to pass those benefits on to developers.

Sync your computers (PC & Mac) and phone. Remotely access files from any web browser or phone. Backup files automatically and securely. Provides business accounts with administrative tools

Tools for online file/docs storage and collaboration. Contains Web versions of Microsoft office editors (Word, Excel, PowerPoint, OneNote). Excel web version allows simultaneous document editing in real time.

Email and store large files easily and securely. Business plan available for group file-sharing

Cloud Drive includes: synchronized folders across one or more computers, syncronized version control to make sure colleagues are working with the most recent files, automatic data backups in the event of a hardware failure.

Share your documents online, send documents without e-mail attachments, embed your documents in webpages and access them from anywhere.

SkyDrive is a file storage and sharing service that allows users to upload files to the computing cloud, then access them from a web browser. It uses Windows Live ID to control access to the user's files, allowing them to keep the files private, share with contacts, or make the files public. Publicly-shared files do not require a Windows Live ID to access. The service currently offers 25 GB of free personal storage, with individual files limited to 50 MB.