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 - [Official Gallery](https://github.com/flutter/flutter/tree/master/examples/flutter_gallery) - Demo for the material design widgets provided by Flutter Team
 - [Flutter Examples](https://github.com/nisrulz/flutter-examples) <!--stargazers:nisrulz/flutter-examples--> - Simple basic isolated apps for devs by [Nishant Srivastava](https://github.com/nisrulz)
+- [Flutter Catalog](https://github.com/X-Wei/flutter_catalog) <!--stargazers:X-Wei/flutter_catalog--> - An app showcasing Flutter components, with side-by-side source code view, by [X-Wei](https://github.com/X-Wei)
 
 ### UI
 
-- [3D Object](https://github.com/hemanthrajv/flutter_3d_obj) <!--stargazers:hemanthrajv/flutter_3d_obj--> - Renders a wavefront .obj on to a canvas by [Hemanth Raj](https://www.linkedin.com/in/hemanthrajv)
 - [Contact Picker](https://github.com/goderbauer/contact_picker) <!--stargazers:goderbauer/contact_picker--> - Picking contact from the address book by [Michael Goderbauer](https://github.com/goderbauer)
 - [StaggeredGridView](https://github.com/letsar/flutter_staggered_grid_view) <!--stargazers:letsar/flutter_staggered_grid_view--> - GridView with tiles of variable sizes by [Romain Rastel](https://github.com/letsar)
 - [Sticky Header](https://github.com/letsar/flutter_sticky_header) <!--stargazers:letsar/flutter_sticky_header--> - Sliver based sticky headers by [Romain Rastel](https://github.com/letsar)