Justinmind offer prototyping and interactive mockups for web and mobile apps, supporting interactive graphics, animations, and user testing, collaboration and feedback sharing, and requirements management.
Axure RP is almost unnecessarily complicated in some areas and the UI can be drastically improved. FlairBuilder is great overall but lack of or slow support is what hurts it. OmniGraffle is one of my top 2 choices currently and InvisionApp is the other.
Justinmind is well suited for creating [mockups of user] interface [screens] on various devises such as Iphone, iPad, and android devises. I wish that there was a low cost version of Justinmind to place on a single users laptop so that they could keep up with all the new functions and upgrades in the product.
Omnigraffle is great for documentation, mapping, flowcharting, and other technical diagramming scenarios. It's simple enough to bang out a quick illustration and powerful enough to build complex blueprints for complicated technical systems. If you need cross-platform compatibility, though, you're probably better off looking elsewhere. If you want complex integration with data sources (ala Visio's SQL Server integration for shape metadata), OmniGraffle also falls short — but those scenarios are few and far between in my experience.
OmniGraffle is fairly simple to use, but the one thing I think it does best is working with curved lines, particularly if you are using some of the available arc templates. Drop an arc onto your page, then tell it the dimensions it needs to be, and viola! Done. Manipulating the arcs is as simple as clicking and dragging offset points.
OmniGraffle has also done an excellent job in stirring up the creative minds of many people who create templates and tools to work with OmniGraffle (not that Microsoft hasn't done so either), and managed to get the bulk of those into well organized repositories.
What it all boils down to for me is: it just works. One doesn't need to have a computer science degree to work with it either. It is as simple or complex as you want it to be.
I'd love to be able to keep more than one of the different tool tabs open at a time.
The stencils are amazing. Would be great if a whole lot more of the free ones came standard as opposed to having to download them from Graffletopia or other sites.
I've used Adobe products like Photoshop and Illustrator to give lots of high quality details and depth to the mockups in the past for client meetings, or I have used Balsamiq for rough drafts for internal teams to show them a working idea on what needs to go on a screen. However JustInMind combines both and gives me the ease of use like Balsamiq and details like color and texture like Adobe Photoshop & illustrator to mockup a mobile application, saving me time, but not compromising on quality.
While these other tools are great for what they are, OmniGraffle’s solid focus on and support for diagramming makes it our tool of choice for communicating workflows and concept relationships, creating documentation, and creating other diagrams. Its libraries allow us to create designs quickly, and its ease of use enables us to use the tool widely across the company without much time or effort spent on onboarding.
Omnigraffle isn't an expensive software tool, so there isn't really any negative from the perspective of raw cost. Thinking in terms of time spent using it on a project - what you create in omnigraffle will inevitably lead to a dead end. It's useful only as documentation. There are other tools like Sketch that integrate into prototyping software and can create useable visual assets for applications in addition to being able to create wireframes.