There are exactly two applications and only two, that require that I use Liunx, MS Project and MS Visio.
For MS Project there is ProjectLibre which is good enough for me but almost all of my customers us MS Project. I am thinking about switching over so this may not be an issue any longer.
For MS Visio there is Dia and yEd but neither support the stencils from network equipment manufactures. My only use of Visio is for network diagrams so this tends to make things really tough.
Otherwise, I have no need for Windows.
Ugh, I should proof read my posts. First sentance should read:
There are exactly two applications, and only two that require I use Windows.