fontskpfonts
I have recently fallen in love with the kpfonts package. Whilst it looks great in both body text and TikZ pictures, my current issue is that I cannot create images in external programs containing this typeface and must resort to Pagella or similar (I don't appear to have Palatino).
I imagine that the fonts as defined in the kpfonts LaTeX package have lots of extra metrics information that would be lost in a TTF/OTF file, but do TTF and/or OTF versions of at least kp serif regular exist?
As I already commented, the low level names of all Kp-Font variants are documented in the manual. But I must admit, that this may be hard to understand.
So I thought, I should show some examples here. Regarding your question in comments see at the end.
\documentclass{article}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[english]{babel}
\usepackage{lmodern} % "Latin Modern" as default font set
\newcommand*{\testfont}[2]{\textsf{#1 (\texttt{#2}):} {\fontfamily{#2}\selectfont
Best off (sic!) 1234567890 Questions}\par}
\setlength{\parindent}{0pt}
\begin{document}
\section*{Examples for low level names of Kp-Fonts}
\testfont{Roman}{jkp}
\testfont{Roman light}{jkpl}
\testfont{Roman, large smallcaps}{jkpk}
\testfont{Roman light, no f-ligatures}{jkplf}
\testfont{Roman, large smallcaps, old style numbers}{jkpkosn}
\testfont{Roman light, oldstyle}{jkplos}
\testfont{Roman, very oldstyle}{jkpvos}
\smallskip
\textsc{\fontfamily{jkp}\selectfont Usual SmallCaps vs.\\
\fontfamily{jkpk}\selectfont Large SmallCaps}
\bigskip
\testfont{Sans Serif}{jkpss}
\testfont{Sans Serif, large smallcaps}{jkpssk}
\testfont{Sans Serif, no f-ligatures}{jkpssf}
\testfont{Sans Serif, oldstyle}{jkpssos}
\testfont{Sans Serif, very oldstyle}{jkpssvos}
\smallskip
\textsc{\fontfamily{jkpss}\selectfont Usual SmallCaps vs.\\
\fontfamily{jkpssk}\selectfont Large SmallCaps}
\bigskip
\testfont{Teletype}{jkptt}
\testfont{Teletype, oldstyle numbers}{jkpttosn}
\testfont{Teletype, oldstyle}{jkpttos}
\testfont{Teletype, very oldstyle}{jkpttvos}
\end{document}
For your document you should define one or two commands depending on, what you like better. I will use here the basic Kp-Font roman, as seen above it is jkp:
A switch similar to \rmfamily or \bfseries: \newcommand{\kproman}{\fontfamily{jkp}\selectfont}, but then you have to set it in a group. Compare what I did in the example inside of \newcommand*{\testfont}.
Similar to \textrm or \textbf a grouping command: \newcommand{\textkproman}[1]{{\fontfamily{jkp}\selectfont#1}}, note the doubled braces for the grouping.
Here is my test:
\documentclass{article}
\usepackage[a4paper,margin=1cm]{geometry}
\usepackage{fontspec} % enagles loading of OpenType fonts
\usepackage{polyglossia} % support for languages
\setmainlanguage{russian}
% default font to keep fontspec happy
\setmainfont{PT Sans}
\newfontfamily\cyrillicfont{PT Sans}
\setlength{\parindent}{0pt}
\setcounter{secnumdepth}{-1}
\newcommand{\testTa}[1]{%
\par\let\cyrillicfont\relax
\newfontfamily\cyrillicfont{#1}\cyrillicfont
#1 (\fontname\font)\par
\sbox0{Та}Kerned width=\the\wd0\par
\sbox0{\mbox{Т}\mbox{а}}Unkerned width=\the\wd0\par
Та\par
\mbox{Т}\mbox{а}\par\medskip}
\begin{document}
\section{Sans serif}
\testTa{Linux Biolinum O}
\testTa{DejaVu Sans}
\testTa{Arial}
\testTa{PT Sans}
\testTa{FreeSans}
\section{Serif}
\testTa{Linux Libertine O}
\testTa{DejaVu Serif}
\testTa{Minion Pro}
\end{document}
You see that Arial and PT Sans kern, among the sans serif fonts. For the serif ones, a kern is applied with Minion Pro.
A further test (not shown) with Trebuchet MS tells that this font doesn't kern that pair. One should test other character pairs in order to have more significant results.
Best Answer
You probably can create the OTF-files yourself. Get fontforge, open the *.pfb and whatever fontforge requires and try file/generate from the menu. Take care that you are allowed to write the new file into the same directory.
I did not try myself, but there is a chance it works.
Alexander
EDIT: It works in the way described above. Tried with one of the kpfonts.