Text and archives

Notepad++
text editor /editor de texto
http://notepad-plus.sourceforge.net/uk/site.htm

WinMerge
files and directory comparison utility /comparar ficheiros e directorias
http://winmerge.org/

Tail for Win32
unix alike tail functionality /mostrar a ultimas linhas de um arquivo
http://tailforwin32.sourceforge.net/

7 Zip
archive compression utility /gerir ficheiros comprimidos
http://www.7-zip.org/

Disktective
find out the distribution of used disk space /analizar a distribuição do espaço ocupado
http://www.disktective.com/

Harddisk Search & Stats
Free search engine for ASCII/text-based files /pesquisas em ficheiros de texto
http://www.harddisksearch.com/

BareTaill
unix alike tail functionality /mostrar a ultimas linhas de um arquivo
http://www.baremetalsoft.com/baretail/index.php

BareGrep
unix alike grep functionality /pesquisar em ficheiros de texto
http://www.baremetalsoft.com/baregrep/index.php

FastCopy
For copy big files in Windows /Copiar ficheiros de grande dimensão
http://ipmsg.org/tools/fastcopy.html.en

Monitoring and System administration

Sysinternals Suite
Microsoft system administration utilities (includes Process Explorer)/ suite de programas da Microsoft para administração de sistema
http://technet.microsoft.com/en-us/sysinternals/bb842062.aspx

RADMIN Network Utilities
IP and Port Scanner, IP Address Calculator
http://www.radmin.com/download/utilities.php

Security, anti-virus and Backups

avast! Free Antivirus
(home edition)
http://www.avast.com/free-antivirus-download

Spybot S&D
Detects and removes spyware /detecta e remove spyware
http://www.safer-networking.org/

GFI Backup 2009
Backup application (Home Edition) /aplicação para gerir backups
http://www.gfi.com/backup-hm

Axantum
Cipher file tool /utilitário para cifrar ficheiros
http://www.axantum.com/AxCrypt/

more/mais..
http://www.makeuseof.com/pages/best-windows-software#antivirus
http://www.makeuseof.com/pages/best-windows-software#malware
http://www.makeuseof.com/pages/best-windows-software#backup

Communication & Networking

Putty
Telnet/SSH client
http://www.chiark.greenend.org.uk/~sgtatham/putty/

PuTTY Connection Manager
manages several terminals with the Putty /gestor de terminais do Putty
http://sourceforge.net/projects/puttycm/

WinSCP
sFTP and SSH file copy
http://winscp.net/eng/index.php

FileZilla
FTP client&server
http://filezilla-project.org/

mRemoteNG
connection manager (RDP, VNC, SSH,..) /aplicação de gestão de conexões
http://www.mremoteng.org/

PDF

Sumatra PDF
lite pdf viewer /visualizador de pdf
http://blog.kowalczyk.info/software/sumatrapdf/index.html

PDF Creator
print to a PDF file /impressão para pdf
http://sourceforge.net/projects/pdfcreator/

Sites and Links

The Best Of: Windows Software (recommended)
http://www.makeuseof.com/pages/best-windows-software

Best Free Software PC/MAC
http://www.bestfreesoftwarelist.com/

FreeByte
http://www.freebyte.com

Portable Apps
http://portableapps.com/
http://portableapps.com/suite (suite)

Portable Freeware Collection
http://www.portablefreeware.com/

Portable Software Applications that run from USB
http://www.pendriveapps.com/

Best Free Portable Applications
http://www.techsupportalert.com/best-free-portable-programs.htm

Great Freewares
http://www.daniweb.com/hardware-and-software/microsoft-windows/windows-software/threads/26606

DAMICON’S LIST OF OPEN SOFTWARE (extensive list)
http://www.damicon.com/resources/opensoftware.html