I've tryed Balsamiq and draw.io but I always come back to old fashioned paper and pencil version. Maybe I miss some great software to do it ?
I like using Adobe Experience Design CC. I thought it was pretty simple to figure out.
Graph paper and a pencil is for sketches. Once the sketch is complete I will transfer it to a wireframe. A wireframe should reflect more accuracy in proportions, sizing, spacing etc than a sketch but is more time consuming to develop. A sketch is less accurate on details but is faster and provides a great way to visualize ideas and UI concepts.
There are a bunch of 'em, and a lot depends on whether you want an desktop app or web-based tool. The benefits of many of these tools are the libraries of UI elements you get with them, or can download for free. Also, some may allow online collaborating and sharing as well. It all depends on what you need.
Here's a few more noteworthy choices:
If you always come back to paper and pencil I assume that you like sketches, and that's very good. And I recommend to keep prototyping in sketch mode until you need more complex interaction validation.
But in some cases, working in sketch mode is too slow. In those cases I recommend a combination between hand-made drawing and the power of software tools, using a drawing tablet and Illustrator or similar. You still can draw to the velocity of your hands but now you can use copy-paste to scale your prototype faster.
Apologies for my bad english.
I hope this helps you.
I typically use Balsamiq for quick drafting of wireframes. Fluid UI is nice to use for making really clean presentation ready wireframes. And if you are making an app iRise is great as you are able to not only mock up the app but also present as how the finished product will work. I really like iRise but it does have a little bit of a learning curve to it. But the wireframes are amazing and impressive when you are finished. And when myback is against the wall or I need to quickly get an idea out of my head and on "paper" Visio is my go to tool.
We're using https://marvelapp.com/ and very impressed.
Whiteboard + phone camera. I have an iOS app called Whiteboard Pro that tunes up whiteboard photos. This method allows very efficient communication of function and UX intent without getting wrapped up in tools and polishing things that don't need polishing.
You can see a dynamically updating list of wireframing tools recommended by startups here https://www.recomazing.com/search/Wireframing
I tried several ipad apps - but they were unstable. Too bad, because I resonated well with visual dragging and dropping and linking of pages.
Went back to index card size drawings first (pen / thick marker / paper). Sometimes I even take a video of cutout pieces of paper interactions to get my point across to the developers.
Sometimes I place an index card on a full sheet of paper, only draw the UI on the index card, but notate words and such on the remaining margins of the paper. Works great.
I use Invisionapp. Interfaces very nicely with Photoshop.