GUI for writing in LaTeX
1) sudo apt-get install lyx
2) If you want to see your math symbols instead of red text, also install the latex-xft-fonts package.
3) latex2html allows lyx to produce html output.
4) foiltex is useful for making presentations.
5) After installing such packages you should reconfigure ( goto Edit -> Reconfigure) and then restart LyX.
For Greek support:
6) Install packages texlive-lang-greek,texlive-fonts-extra,texlive-latex-extra
