Inkscape, an excellent drawing tool natively supporting SVG.
MiKTeX, an excellent TEX distribution for Windows.
XMLmind XML Editor, a visual XML editor with built-in support for DocBook 5. There are many fine XML editors but this one
has a free Personal Edition allowing to use it to create documentation for Open Source projects such as Scilab,
has a configuration specially designed to support the Scilab DocBook 5 subset.
This Scilab configuration is available as an add-on. This add-on may be downloaded and installed directly within XMLmind XML Editor using menu item Options|Install Add-ons. But before being able to do that, you must specify where to find such add-on. Fortunately this is done once for all:
Use menu item Options|Preferences.
Click on the "Install Add-ons" item in the left pane.
Click the Add button found at the right of the "Download add-ons from these servers" list.
Specify the following URL "http://www.scilab.org/download/scilab_config.xxe_addon
" when prompted, then click OK.
Click OK to close the Preferences dialog box.
From now, you can use menu item Options|Install Add-ons and select the add-on called "A configuration for the Scilab subset of DocBook 5" from the list of all available add-ons.