If you are about to start your journey into HTML5/Hybrid app development but are a little confused about how good hybrid apps can get, then read on.
HTML5 apps have a relatively bad reputation as compared to native Apps. One of the main reasons for this is because it is amazingly easy to create crappy HTML5 apps even without knowing it… I was once guilty of this.  
Another reason is that some hybrid app developers are from a Web Design/Development background so they tend to develop apps just the way they would for a standard website forgetting the fact that mobile apps run on devices with relatively low hardware configurations.   This means using some things like unnecessary Javascript animations would absolutely be inappropriate for a Hybrid App.
So below is a list of some pretty cool HTML5 apps/games for your inspiration

Brick Breaker Bold for BlackBerry10 – I didn’t believe this game was actually created with HTML5 until a BlackBerry Development Advisor confirmed it
BlackBerry10 Browser – I still find it difficult to believe that the BlackBerry10 native browser was built with HTML5 even though it has been confirmed from a BlackBerry source.
ViceVersa
Walk2view
GT Bank Mobile App
Tic Tac Toe   –   This game is really amazing
Summon
Love Sms Collection   –   I personally developed this app, and I know there is still room for improvement
Pin Pals – Meet your next date   –   This app can also be greatly improved on but it still deserves to be on this list.

This list would be updated from time to time. ... Read more at https://fincoapps.com/some-really-cool-html-5-apps-for-your-inspiration/