Kenny Pearce hosts the latest philosophy carnival here. The theme is metaphysical idealism, which is the view that the fundamental stuff of the universe is the mind and/or the mental stuff (i.e., ideas) associated with minds.
The 68th philosophy carnival will be hosted by MQPhil, a blog at Macquarie University whose contributors are mostly undergraduates. The theme is “open source.” As the call for papers indicates, posts can be about the philosophy of open source or open-sourcing philosophy.