Free office suite – the evolution of OpenOffice. Compatible with Microsoft .doc, .docx, .xls, .xlsx, .ppt, .pptx. Updated regularly, community powered.
For its price, it’s amazing. As a replacement for Excel - it’s fine I guess, but really depends on what your do. Excel has a lot more features than libre office doesn’t have (formatting as table, the newer formulas, and the VBA code is not the same). However if you just want it to do basic calculations with, like, excel 2010 equivalent then it will definitely work. Things like data validation, conditional formatting, nested formulas, and recording macros will work no problem.
For its price, it’s amazing. As a replacement for Excel - it’s fine I guess, but really depends on what your do. Excel has a lot more features than libre office doesn’t have (formatting as table, the newer formulas, and the VBA code is not the same). However if you just want it to do basic calculations with, like, excel 2010 equivalent then it will definitely work. Things like data validation, conditional formatting, nested formulas, and recording macros will work no problem.
I can’t really speak for the other products.