What is "Ripple"? (Satoshi emails)

Note: This is NOT about XRP cryptocurrency (which is indeed called Ripple, or their company is or whatever)

Edit: Well apparently it IS about Ripple after all, just before it became the XRP we know it to be today.

I've been reading the new Satoshi emails with Sirius, and in there Satoshi mentions another internet money project called Ripple several times. Now this is back in 2010 times, he's definitely not talking about the modern crypto XRP. I've seen this Ripple mentioned before from Satoshi in the bitcointalk archives too. I tried to search the net for an answer as to what Satoshi is referring to when he mentions "Ripple". I'm looking for some info as to what that is, if anyone here knows. Here is one example (from the FAQ section he sends to Sirius):

"

Are you familiar with Ripple?

As trust systems go, Ripple is unique in spreading trust around rather than concentrating it.

[I've been asked at least 4 other times "have you heard of Ripple?"] "

Satoshi seemed to know about a lot of previous internet money projects, and spoke about them somewhat, so I was trying to learn about it, and when I search Ripple all I can find is stuff about XRP. Does anyone have more info about it to share?

PS this was blocked from being posted in r/bitcoin, I guess I mentioned XRP and they don't allow it, it was blocked the instant I posted it so it didn't seem to be a human decision. FUCK R/BITCOIN