I use Academy.kz and CMU Serif (default LaTeX font) for scientific articles,
Sans Forgetica just for fun,
and for rest: Avenir Next, Gill Sans, Trebuchet (those three I took from Nook e-readers, so they are not freely available, sorry), Cambria, Literata, Palatino Linotype KZ, Seravek, Ubuntu, and Verdana.
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