Useful Software and Hardware

I thought that I start this thread to share and understand favorite technology, software or hardware for every day usage.

For me:

Software (that I can't live without):
-TrueCrypt (for Encryption)
-Beyond Compare(for comparing files and folders)
-Gadwin (for snapshot picture - light weight)
-Ultrapad (notepad replacement)

I like lightweight software with minimum footprint.

Technology:
-VirtualBox or VMWare or VirtualPC (test environment)

Hardware:
-Maxed out RAM

Feel free to share yours (everyday usage or favorite)

This thread has been running for several years:

What "little" program could you simply not do without?

Everyone knows the answer is Irfanview. It can solve global warming, tune up your car engine and cook your dinner all at the same time.

I think it shows pictures too. :D