I've got my air-jack hammer
I've got my saber saw
I've got all I need
Cuz I got my tools
(Flour, "Tools")

Related stuff

Some stuff that should be useful for project-management:

aminet:dev/c/make_bin.lha, an Amiga-port of GNUmake. different to several other Unix-ports, no ixemul.library is required.
aminet:dev/gcc/gccXXXdoc.lha, which contains (among other documents) the manual to GNUmake in AmigaGuide format (the full filename depends on the version of gcc).

As hsc's syntax check is quite small and clumsy, maybe you should also have a look at one of the following sources:

CheckHTML - based on SGMLS, but easier to use. Available from aminet:comm/www/CheckHTML.lha; for those who insist on using a DTD.
WebLint, a Perl-script that is even more cryptic to configure than hsc. And it's Perl.. würg, kotz, reiha.. (http://www.unipress.com/cgi-bin/WWWeblint)
HalSoft's validation service maybe provides the most competent syntax-check, but most likely the slowest. (http://www.webtechs.com/html-val-svc/)

To use Un*x-alike filenames within AmigaOS, there are numerous tools available. For example, you can use

And some resources that have been quite useful during the development of hsc:

The only human readable html-reference I've found so far. (http://www.sandia.gov/sci_compute/html_ref.html)
A w3-FAQ that covers even the Amiga. (http://nswt.tuwien.ac.at:8000/htdocs/boutell/)
Composing Good HTML, a general introduction to the whole html-problem. It's also useful to better understand several messages of hsc. (http://www.cs.cmu.edu/~tilt/cgh/)
Richard Scarry: "Mein allerschönstes Buch vom Backen, Bauen und Flugzeugfliegen" - a general introduction to life and how to cope with it.