On my Mac I was using LaTeXit. It takes a LaTeX code and produces instant pdfs (or pngs, jpgs, etc…).
I'm sure there's a similar programme for Ubuntu. But I was unable to find one.
Thanks in advance, Markus.
Oh, I would definitely recommend LyX for this. The upcoming 2.1 (to be released shortly) contains an "equation editor" mode that can generate similar output as KLatexFormula or Ekee. You can install the latest beta release (and soon the RC release) from LyX PPA (development).
The equivalent application should be KLatexFormula, which can be installed by
But if you have a recent enough Ubuntu, the current version (3.2.7) triggers a bug that makes it unusable, which is fixed in 3.2.8, but it is not available at this date.
You can probably compile it from source following the instructions, I have not tried.
I have submitted a bug report.
UPDATE --- there is already (two hour after the filing of the bug!) a fix filed for Trusty that should fix the problem. Thanks to the developer.
For the sake of completion, a few more LateX equation editors: