Android

=Apps= List of useful Android apps.

File Exchange

 * Ubuntu One - cloud storage, 5GB
 * can share folders with emails, permissions: read, edit
 * can have public files via "Public URL"
 * can synchronize different folders from your disk (Dropbox syncs only 1 folder)
 * but couldn't sync folders from my shared between Ubuntu and Win disk, NTFS formatted.
 * If you have UNAUTHORIZED error while login:
 * Remove your device https://one.ubuntu.com/account/
 * In your Android settings "Date and time", set "Automatic" and try to login again.

Mobile Calls

 * Forfone - 100 free minutes from Android/iPhone to landlines in: Germany, Switzerland, Italy, Spain, Holland und UK (Source). (tested to German landlines - works)
 * Handcent SMS - send free sms. (tested successfully from Germany to Germany and Bulgaria)

Flickr

 * upStream - upload multiple pictures from Gallery.
 * + Picture selection is very easy.
 * - Naming: the same name is used for multiple pictures.
 * - Flickr Set cannot be created.
 * - Price €0,72