Moped

Moped is a simple, yet powerful, private messaging service. Use Moped to send messages to others from desktop and mobile, harnessing the full potential of the Web.

Sending messages is as convenient as instant messaging (IM), and as quick as text messaging (SMS). Users aren’t tied to a particular device; messages are accessible from desktop, mobile and even your email inbox.

Users direct messages to each other by @-mentioning the intended recipient(s) (e.g. @dave what time does your flight arrive?). Users can also create message filters on-the-go with hashtags (e.g. @sarah, arriving in #Berlin around 8ish). All messages are private.

Moped is integrated with Dropbox, allowing users to share files within the service, while the Chrome extension enables users to start conversations from anywhere on the Web. Further third party service integrations are planned.

Requirements:

Twitter account