Also, the community across the world has published some free plug-ins and components. You can search for them primarily in the main forum on Sencha's website at http://www.sencha.com/forum/. However, Ext JS version 5 does not have many free plugins available.

Almost all the free plugins are/were made for version 4.x. Some of them may be compatible, while some others may not be, due to code changes from version 4 to 5. Still, some developers have made porting and compatible versions for Ext JS 5.

However, due the similarity of the framework's architecture, it's also possible to download plugins made for version 4 and give them a try in version 5. Yet, be aware that these plugins may require a few modifications in order to make them work on Ext JS version 5.