After reading Why did the Ulysses probe reach Jupiter much faster than Galileo? and answers to How many Space Shuttle payloads ended up beyond Earth orbit? and also What's the largest rocket that was carried to space inside a Space Shuttle? I thought of the ISS.
Considering how low mass but high ISP propulsion for smallsats has continued to develop, I realized that the ISS could really be a "launch platform" for spacecraft that will leave Earth orbit. (almost an example)
Question: How many spacecraft deployed from the ISS have escaped Earth orbit? Are there plans for any in the near future?
I chose "beyond Earth orbit" rather than "deep space" so as not to exclude anything that ended up cis-lunar.