This site shows you some Praat scripts, which you might find interesting just in case you come across the same problems and tasks as me.

If you notice some errors or you happened to find an other more elegant way, please let me know.

search for a string within a corpus of TextGrids (script) The returns a table in the info window.
histogram-like scatterplot of F0 and calculation of the mode value in Hertz or Semitones (script)
conversion of an ELAN-file into a PRAAT-Textgrid (script)	sorry, script is under construnction!!!
waterfall plot of segmented periodic parts  (script)
a formant analysis based on point tier (based on one script from B. Remijsen and another one from H. Mitterer)(script)
exploration of Praat's in-built segmentation algorithms
(editorscript) draw sound and pitch contour of selection
(editorscript) draw sound and spectrogram of selection
insert wordlist into textgrid (script)