f-spot (comes with ubunu) allows us to email the pictures. It will open the compose email for us with the pictures attached by itself. The usual problem is the attachment exists just for 30 secs. If we keep on composing the mail for more than 30 secs, the mail client will fail to attach. (bug/77135 ).
Work around : using gconf editor increase the value of /apps/f-spot/export/email/delete_timeout_seconds