GLPi

This single software has many components software which has helped a lot in tracking the asset and the tickets raised along with solution provided history.
All the assets are once updated into the system, It has helped to track assets in and out. It also provides desk support feature by which any body in organization can raise a request and can be tracked the same.

Manual updation, all asset entry has to be done manually. There is no feature for auto discovery like in OCS.
Since it is a paid software subscription is required.

It is free, and even if you are not dealing with IT resources, you can tailor this software to use it to manage your support service. I have used it a couple of years to manage an academic research laboratory in a public University, but migrated to another solution because usability drawbacks and old-fashioned interface. Anyway, I do recommend it for people working with IT, because it is rich inbuilt-in features that makes easier to use it for the purpose he was originally designed for. On the user side, however, the software works without much problems.

The interface is dated, and initially may be very difficult to find where are the settings that the administrator want/need to change.

it is really a multipurpose tool, we are using with the ticketing, but also for maintaining our CMDB. IF you don't need extended features it is free.

If you want to customize the UI it is import to modify php files and understand the glpi DB structure

After other ITSM tools, GLPI was not very hard to configure and deploy.

The flexibility for changing the standard behaviour of the solution. You should develop your functionalities.
User interface was old style and the users didn't like it at all.