Lucidchart

Abundance of features, which makes this software so versatile. You can basically use it for every task and project.
I mainly use it for mind-mapping and brainstorming, but it's also equally useful for taking notes, story-boarding, gathering ideas, presenting, drawing graphs, schemes and organisational charts, Gantt timelines, or even team building (it works great as an online whiteboard).
What I really love is ease of use and multitude of features. Every time I wish I could do something, it turns out it's possible. Seems like developers really thought about everything and listen closely to their users and use cases.
Also, you don't really feel that the software is locking you in--you can export your projects to similar software/platforms, e.g. Visio.

Getting to know some features takes time and energy, documentation and tool tips have some space for improvement.
Also, licencing model could be more friendly for small companies or people who use it as backup/auxiliary software only (en entry level paid subscription model).

Very intuitive and easy to use business process mapping software that can be used through the browser. I was looking for a MS visio replacement to run workshops with and this met my needs. I like the pre-built templates and the fact that i can have my colleague update the same business process map at the same time im using it (only available if you upgrade). The ability to publish to a MS visio format and a weblink is also useful. You can access the software directly on your browser as a SAS so it doesnt require any installation of software which makes it convenient if you're jumping between computers (it allows you to access your diagrams anywhere since its stored on the cloud)

-There's some minor glitches when mapping out business process lanes and performing some of the tasks. Formatting the process maps can be annoying sometimes and it does not have all the formatting customizability that a more robust business process mapping tool like MS visio has. Sometimes the browser is not responsive if you go idle for too long.
-I don't like the fact that users need to register/create an account if I want to share the published link with my business process maps to them
-Costs are kind of a turnoff because I'd rather pay a one time fee rather than a subscription cost since its not every day you'll be using this software

I love how easy it is to create flow charts, workflows, and diagrams in various formats. There are other software out there that accomplish this function but Lucidchart is really cost effective for educational institutions and meet the need very well.

It took a little bit to understand how to work the tools and formatting but once you get the hang of it, the software is pretty easy to use. It would be awesome to have some sort of training manual to refer to help those new to process mapping understand the various symbols but considering how cost effective it is, that's really a non-issue.