Developer Sarina DuPont from Embarcadero has a blog post up which highlights the new TImageList component available in Delphi XE8 Firemonkey. An image list is a centralized collection of small images for displaying on graphical controls in a TMenuItem or a TListView. One example is you can store just an image index id in your database instead of the entire image and then link your image list to items in a TListView. In the blog post there is a demo which shows how to use LiveBindings combined with a TFDMemTable to do exactly that. This new component is available on for all four platforms supported by Firemonkey which are Android, IOS, Windows, and OSX. One alternative to using an image list is to store your images in BLOB fields within a database or in memory table. The documentation on the Embarcadero docwiki is very extensive for this new component. There are actually two different demos linked from the blog post. One demo was created for the blog post by Sarina and the other demo is part of the Delphi XE8 demo collection. You should be able to utilize TImageList in Appmethod and C++Builder as well.
FMXExpress.com has over 700 tips and tricks for building cross platform apps on Android, IOS, OSX, Windows, and Linux with a single codebase and single UI using the FireMonkey framework found in Delphi and C++Builder.
FMXExpress covers top cross platform secrets for FireMonkey in C++Builder and Delphi XE5, XE6, XE7, XE8, Seattle, Berlin, Tokyo, Rio, and Sydney.