The hype here at #SPC14 is absolutely huge. I am extremely excited about so many new things that are announced. I'm going to start keeping track of everything I find interesting and post it, so keep an eye out.
Office Web Widgets (Preview) - http://www.nuget.org/packages/Microsoft.Office.WebWidgets.Experimental/ Nice components for provider hosted apps. The People Picker is something to check out.
Office SDK for Android - https://github.com/OfficeDev - this looks like a repository that the MS Office team will publish dev related stuff. So far the Android SDK is there, but maybe that’s it.
SharePoint Workflow Apps - I still need to find a link for this one. Keep an eye for an update.
Office 365 Device and website Apps - Same as above. Keep an eye for an update.
SharePoint 2013 and SharePoint Online solution pack for branding and site provisioning http://www.microsoft.com/en-us/download/details.aspx?id=42030 - Nice, putting this in my reading todo list.
Office App Model samples - http://officeams.codeplex.com/ (Blogged by Vesa here: http://blogs.msdn.com/b/vesku/archive/2014/03/03/announcing-office-app-model-samples-codeplex-project.aspx) - Really nice stuff, I saw Steve Walker hit the "publish" button in front of me. That was epic…. I can't wait to find time to check these out
There's some other new stuff like O365 Discovery Services & Azure AD OAuth. I still have to get my head around that one.