Is it possible in QGIS to create lines from a table storing the X,Y-coordinates of starting and arrival points, so that a line.shp is automatically created? Or does a plugin exist to achieve that?
You could make a text file something like that shown below.
Geom|Name LINESTRING (401835.463 143853.834, 402685.304 146873.003) |Line 1 LINESTRING (401276.358 148382.588, 403367.412 144994.409) |Line 2 LINESTRING (403870.607 149646.166, 399487.220 141069.489) |Line 3
Add the file to QGIS: Layer -> Add Delimited Text Layer. Click the 'Plain characters' radio button and enter the 'pipe' character | in the box. Click the 'WKT' radio button and select 'Geom'. When the lines load set the CRS of the layer. Then save the layer as a shapefile :)