Balsamiq

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.

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

The ease of use and minimalistic design is my favorite factors in Balsamiq. The drag and drop- WYSIWYG framework make it easy to learn and get going from the day one

Option to collaborate can be improved, by tagging teammates and discussing real time

I like the limitations of this software. The stripped back and lack of styling allows me to focus my time only on UX. Previously, I have had issues where doing UX in XD or Sketch the client would be trying to make too many visual considerations. Since moving to Balsamiq this has streamlined communications to focusing on interaction points, hierarchy and best practices.

Not a con, but being able to assign labels for titles (H1, H2, H3 etc) would really help improve integration with CRO and SEO specialists. Also being able to have titles with multiple lines of text.

A larger and more consistent base of templates would be beneficial - i.e. landing pages, ecomm, brochure sites. Currently there's a lot of app based and molecule based templates and I don't utilise any of these.