For the wireframes, I like Sketch and OmniGraffle -- I've used a ton of tools, I keep coming back to these two:

* Sketch - Professional Digital Design for Mac || https://www.sketchapp.com/

* OmniGraffle - diagramming and graphic design for Mac, iPhone, and iPad - The Omni Group || https://www.omnigroup.com/omnigraffle

I don't dislike Balsamiq... and if you have to work with Windows... cool, this is probably your best option. Still has its place, it's fast and easy to use.

* Balsamiq. Rapid, effective and fun wireframing software. | Balsamiq || https://balsamiq.com/

(I also don't hate just doing quick mockups in Bootstrap, it's fast and simple to slap together.)

http://getbootstrap.com/

(And if HTML isn't your thing... there are some WYSIWYG tools.)

* Jetstrap - The Bootstrap Interface Builder || https://jetstrap.com/

For clickable interactive demos, I like:

* Free mobile & web prototyping (iOS, iPhone, Android) for designers – Marvel || https://marvelapp.com/

(NOTE: I don't love the feedback tools in Marvel or InVision -- and I really hate how much InVision tries to do, I don't want my design tools to do project management or 14 other things, I just want them to do design.)

I like drawing... this works great too...

* POP - Prototyping on Paper | Mobile App Prototyping Made Easy || https://popapp.in/

For feedback and annotations, I like:

* Red Pen || https://redpen.io/

(NOTE: But I wish Red Pen integrated with Slack... it's a one-hit-wonder, the creators built it 3-4 years ago and basically haven't done shit for improvements since... frustrating since it's still useful but they literally don't care about making it any better than it is...)