whatever MS office has, open office/Libre office has but for free.
They may be a different layout and harder to use, after you know what's what its easy on Linux.
and Linux lags less and doesn't need anti-virus. Linux can be used on systems with strange architecture too. Linux 32 bit management is also far better than windows, e.g. win-32 can only have 4GB(3GB max in most cases) Ram max but linuc can have 64GB Ram max.
and if you're gonna be using more than 16TB of HD use linux because windows stops at 16TB but linux stops at 1.8 EB
Also linux comes with a bunch of pre-programmed of maths Software other than OF Calc.