Balsamiq

Pros

Balsamiq allows you to make speedy, basic wireframes and nail down all the details of your site/interface before implementing or designing them with graphics. The best feature is being able to depict any possible element used in web design: Menus, radio buttons, text boxes, popups, forms, anything you can imagine. It also allows you to show those items in different states--for instance, if you needed to depict a drop-down menu that had been opened to view all the available drop-down options. The deep customization allows you to work out every detail of an interface before going to production. Revision histories and alternate layouts provide lots of room for creativity--a critical part of building great user interfaces.

Cons

Some of the features, like revision histories, are hard to figure out at first and require a short learning curve. It takes some time to play around with elements and find all the available options, and also requires time to realize what elements are available to use. It's difficult to browse elements and all their states; you have to select them, and then dig deeper within the element's settings.

Pros

- Probably the easiest wireframing tool to use
- Focused feature set aimed at creating wireframes in the minimum of time
- Very quick to learn with some depth for power users
- Can be very quick to use for experienced users
- Ability to download pre-made components from a central library or share components easily within a project
- Much cheaper than some competitors
- Very stable application

Cons

- Wireframes can look child-like and unprofessional with some settings
- Currently based on Adobe Air technology which is outdated
- No recent feature releases and no fixed release date for the next version leading to a feeling that the product is not moving forward
- Some expected features are still missing such as an easy way to create click-through interactive prototypes

Pros

I found it extremely easy to use. It took me very little time to understand the concept and then I was up and running. As I continued to use it I picked up shortcuts and advanced features. It really plays a big role in communicating what needs to be built. I also really like exporting a project into a PDF file so it can be used as a demo with options linking to various pages.

Cons

I haven't really found much that I did not like. There have been times when I would like to have some more elements to include in my wireframes. I have seen some that were available for purchase which is nice.

Pros

As a BA, whenever we receive technical specification from the client and break these down to user cases, it becomes important for us to design Mock-ups and confirm if we are on the same page as to the client before we rush into development to do so Balsmiq Mock-up is the one of the best tool around.
Designing the User interface design is faster with available element in User interface library. Just need to pick and drop items in the mock-up.
It is simple & easy to master. Interactive prototypes can be easily created by linking the mock-ups together to give operation view in the real time.
When you are done with prototyping the requirement then export option is also available. Either you can export the single mock-up or all together in PNG format or export the Mock-up as PDF. Export to PDF option is my personal favourite as I usually attach the mock-up in mail and share initial design with client and hence entice their feedback that let us to improve our design as directly from customer perspective. PDF exported file facilitates navigation between mockups through links present in pdf ensuring better understanding of functionality to the client.
It also has chat box and multiple user can operate simultaneously to create mock-ups and access the existing mock up as well . This provides the better communication between the team member and a quality experience of software development
It facilitate plugin from Google drive and Zora allowing to add mockup to and issue.

Cons

I think the tool lacks in integration with other tools that are used in software design as well as export option is limited to export as PDF or PNG and you can't Print to the printer directly. Except that I think it's a wonderful tool as it's web, desktop as well
as Google drive plug in is available

Pros

It's a simple wireframing solution that allows multi-page PDF exports. The available tools and controls are simple, which forces you to design with a wireframe mindset and not get caught up in the visual details.

You can get creative with the included assets to create elements that are not built-in by default. Balsamiq supports saving elements as symbols so that they can be easily reused across wireframes.

Cons

I have a licensed copy of Balsamiq Wireframes, however that does not allow me to receive major-version updates. I paid nearly $80 for a license years ago, but in order to upgrade, I need to purchase a new license (albeit at a discount).

I would also like to see a wider variety of predefined assets included out of the box.