There are many other CryptoNote coins but their communities, usage, trading volumes and hashrate are much smaller than Monero. Here is a chronicalogical graphic of many of the coins and from where they were forked: https://en.wikipedia.org/wiki/CryptoNote#/media/File:Forks-tree-fixed.png

You mentioned Boolberry, which like Aeon was an innovator in the area of pruning. Boolberry was popular early because (in addition to pruning) it was the first CryptoNote coin with a working (but very basic) GUI. Its developer has been inactive for some time. Aeon has a visible lead developer (smooth) that is also a Monero core developer, so Aeon has received far more attention than Boolberry recently.

Many CryptoNote coins appear to have been created by the same parties: https://bitcointalk.org/index.php?topic=740112.0

Measured by Bitcointalk activity, I would estimate the most active CryptoNote communities are currently:

Monero (XMR) largest community (RingCT, LMDB, OpenAlias, tail emission, etc) Aeon (AEON) (pruning, focus on low memory footprint) Boolberry (BBR) (pruning) DigitalNote (XDN) (PoA development following multiple name changes) Bitcedi (BXC) (XDN fork with slower emission) Bytecoin (BCN) (First CryptoNote, compelling evidence of fake creation date) Dashcoin (DSH) (automated BCN fork without huge "premine") Pebblecoin (XPB) (PoS)

All have operational blockchains and varying level of developer activity or complete absence of activity.