Hey, I build this today, https://github.com/Tsangares/iotasecret
Pretty much you can use it to send some text to the ledger using a passphrase. You can then retrieve this message from any computer by just giving
iotasecret the same passphrase. We all know this could be done, but this little utility is just a pip package so it is really easy to install and use,
pip install iotasecret
To upload a message or note you simply use the command,
iotasecret emit MYPASSPHRASE --message 'my message'
To get the message back on any computer, you just have to have the passphrase,
iotasecret read MYPASSPHRASE
Boom! You have your messages being sent and stored without a intermediate server. The messages are being encrypted by your passphrase, and each passphrase stores the messages at a different address.