The replay launch webinar done by the PM team earlier in April is available on YouTube and it is linked at https://community.embarcadero.com/blogs/entry/10-2-3-webinar-replay. You can also browse the community for all of the 10.2.3 related blog posts at https://community.embarcadero.com/blogs/tags/tag/10-2-3
Two two recent patches are:
C++Builder 10.2.3 C++ Compiler 4k Stack Allocation Patch at https://cc.embarcadero.com/item/30834
RAD Studio 10.2.3 Context Help Patch at https://cc.embarcadero.com/item/30833 (notice that depending on the browser you used for download, the files might have a wrong permission setting, read the additional information in the download page)
I already blogged about these previous patches:
RAD Studio 10.2.3 EMS Package Wizard Patch at https://cc.embarcadero.com/item/30832
RAD Studio 10.2.3 Android Push Notification Patch at https://cc.embarcadero.com/item/30831
Finally, you can find on the GetIt package manager IBLite 2017 and IBToGo 2017 as additional downloads.