CHILDREN OF THE BLOOD is a supplement to CULTS OF THE BLOOD GODS and a stretch goal for its Kickstarter. Basically, it is a book of NPCs (or SPCs as White Wolf is now styling its terminology) as well as some rules for running cults in the World of Darkness. It is a spiritual successor to CHILDREN OF THE INQUISITION, which was a book that provided some important power players like Dracula and Etrius during the early days of the line. It actually reminds me a bit more of CHILDREN OF THE REVOLUTION in that it is a bit less overt in the importance of the NPCs that it presents.
The VAMPIRE: THE MASQUERADE COMPANION is a relatively short sixty-five page book that was released for free by the folks at White Wolf and Paradox Interactive. I have the suspicion it was what was written up for the Vampire: The Masquerade Players Guide that was going to be released by Modiphius Entertainment but was delayed until the point of cancellation. If so, I think it was very nice of them to release it. Certainly, it helps keep the updates flowing into the setting and helps motivate the fan base into continuing to play the game.
LET THE STREETS RUN RED by Onxy Path Publishing is a collection of four Chronicles for Vampire: The Masquerade 5th Edition. It is a stretch goal from the 2018 Kickstarter for Chicago by Night 5th Edition, a book detailing the supernatural movers and shakers for the Windy City. Basically, for non-tabletop roleplaying gamers, it's a book of four adventures to play as vampires. I've been waiting for this book for a long time, specifically two years, and I'm extremely excited to finally get to dive into its complicated adventure hooks.