Twitter has always been great for one-offs into the ether, but if you happen upon a dialogue that interests you it's a bit of a pain to read. Bettween makes Twitter dialogues much easier to read.
The interface of Bettween is straight forward enough, you plug in the @twitter accounts of two people who are having a conversation you want to read more easily. Instead of having to click through the reply links link in the default Twitter interface Bettween does the leg work for you and lays the conversation out in a back-forth traditional chat dialogue.
If you want to share the conversation on Twitter you can easily share a link to the Bettween thread and in its unshortened form it shows the names of the users, http://bettween.com/user1/user2.
Have a favourite Twitter tool? Let's hear about it in the comments.