Amen, brotha! There are several categories from that list in which I use free but closed-source programs, because they are miles beyond the best OSS software. (For example, µTorrent rather than Azureus.)
Plus foobar2000 and EAC for audio for example. It's not OSS but I can't live without them.
The good thing about the list is that most programs exists in other systems too (Linux/BSD/Mac/etc), so if you have to use xx OS or yy OS you'll not have too much problems regarding getting used to applications.
The ones I use personally, which are
lightweight,
native,
free,
open-source and
cross-platform (Windows/Linux/BSD/Mac/etc) are:
Mozilla Firefox - The red panda browser
VLC - Plays everything everywhere
VNC - Remote administration everywhere
Audacity - Good audio editor
wxMusik - A foobar2000 wannabe
Filezilla - A very good FTP client/server (it's being ported from MFC->wx)
Code::Blocks - One IDE, to rule them all!
SciTE - Fast, lightweight and advanced text editor with syntax highlighting
AMP - Apache, MySQL, PHP, the system doesn't matters
AegiSub - For advanced video subtitling
poEdit - For translating gettext catalogs
wxChecksums - For checking SFV/MD5 checksums
Chromium - Great small OpenGL space shooter
Preferred multimedia formats:
MKV - Multimedia container
FLAC - Lossless audio codec
OGG - Lossy audio codec
XVID - Great video codec
x264 - Better video codec
PNG - Lossless image format
I'm missing some native cross-platform programs, such as an Explorer replacement, an Image Viewer, and a lot more, but I can live without them happily for now.