Spiceworks

If you chose the cloud way, there's nothing you need to install: just register and you're u and running.
The ticketing solution is simple and quite basic, but definitely easy to use and simple to manage: forget advanced automation, multiple queues and automated workflows, but you can define some rules and automatically assign or categorize your requests quite easily and effectively.
You also don't need to add users, just technicians: they're added as soon as they submit a request, and that simplifies user management.
It integrates with other Spiceworks tools such as Inventory, and that's quite useful.

There's almost no automation (really basic), and you cannot manage different queues to route tickets to.

We used Spiceworks for over a year. We lived and breathed in the Help Desk environment. It was great. We had memes on the office, making sure everyone put in our tickets, and tracked everything we possibly could. When techs were in the field, a quick app click, and recording our voices to tickets. It was just awesome.

Then administration wanted to try getting logs / reports from the system. Spiceworks was excellent for IT, but junk for a non-IT administrator wanting oversight. The reports were too techy, too details, no summary. EG: Bar Graphs, Pie Charts, and fluff. Spiceworks was all business, which was the problem, I needed to show a little fluff.

The advertisements also made it a little, meh, for when other users were posting tickets. Lets face it, they weren't the kind who were looking for datacenter solutions (typical ads we saw).