Armispian Systems does system conversion, converting Windows systems to Linux systems mainly, but also converting from commercial software to Free Open Source Software. This process often involves some training of the end users so that they are able to use the newly converted system effectively.
Armispian Systems believes strongly that the software that you are using should be legal, and has found that in most cases FOSS often does as good or a better job than commercial software does, so in many cases will encourage the use of FOSS to clients when considering changing how the client works with hir system.
Some examples of Open Source software that work as well or better than commercial software are Mozilla Thunderbird, Mozilla Firefox, OpenOffice, and VLC Media Player.
There are a number of licenses that are out there, there are proprietary/commercial licenses which vary with every piece of software you install (even Microsoft does not appear to be using the same licence for all software). There are a number of Open Source licenses, the most common probably is the GPL, LGPL, and Apache Licence. All of these are "OSI Approved". A number of "Open Source" licence do not quite meet there criteria, but are still in use anyway.
We like to use licenses that are OSI Approved, as this gives us a fair understanding of what the licence is saying in broad strokes by that alone. A lot of the software that we use uses the GPL, or LGPL licenses. We also use a number of pieces of software that are commercial licenses, which we honestly do not understand. This web page is being written on a combination of software including Inkscape, GIMP, and Eclipse, which are open source, and Adobe Illustrator, Photoshop and Dreamweaver which are commercial equivalents. Often the "best" way to get a job done is to use multiple pieces of software, each doing what it does best.
We have done a number of conversions. One conversion was taking a Windows 95 system and installing Linux on that machine. That machine continues to run Linux, and continues to be in use. It also has gone through a number of different versions (distributions) of Linux, over the years, and is almost at the point of retirement.
Another conversion that was done was converting a Windows 2000 machine to Kubuntu Linux. This was a recently done conversion. The machine like the other one was changing hands at that time and the current users are working their way to getting the stuff they have on their Windows ME machine over to the new Kubuntu machine.
A third conversion we have done is not a conversion as much of an existing system, but the replacement of the Windows 2000 system with a Windows XP system.
All of these conversions have required training of the people who will be using these systems. Often this is ongoing. Depending on what is involved a lot of this id often a number of short walk-throughs that are not charged for individually.