In no particular order:
- Opera
- Openbox
- Notecase
- dzen2
- bash
- Thunar
- Midnight commander
I've got a few.
Firefox, since it gives me full control over what I encounter on the Internet. Now if only I could use Adblock Plus on those annoying TV, radio, and newspaper ads...
Thunderbird, which puts Evolution to shame. Thunderbird 3 is looking even better!
Synaptic, which I think is the best package management tool available. I hope Ubuntu doesn't make the mistake of adopting PackageKit.
“Really, I'm not out to destroy Microsoft. That will just be a completely unintentional side effect.”
-Linus Torvalds
Keeping the side effect going since Summer 2007
Open Office
Gmail
Google Docs
Tomboy Notes
Exaile
And as for web browser: Linux: Epiphany
Windows: Chrome (the most amazing ever)
Linux: Compiz (it's great, ok?).
Other than that... GScrot, the gnome panel (applications places system one. best design ever), workrave (it's a love/hate relationship there).
Web: Adobe's Acrobat.com (sorry google docs, but aren't particularly appealing when compared to this), GMail (most decent web-based email available. Decent spam protection, nice space, and a decent contacts manager (new one sucks though, I have to keep switching to old one everytime)), Wordpress (what can I say? It's just simple, and has tons of themes/plugins available, making it quite appealing. I wish it was more secure though).
My own application, Parcellite.
Parcellite Clipboard Manager - In Soviet Russia, clipboard manages YOU!
Then you would cripple our economies (okay okay bit late for that but...) and would ensure we had to pay for everything because it is advertising that keeps everything, including most Open Source ventures, free.
back on topic: I'm not sure what a 'killer app' actually is, other than an annoying buzzword. I guess Photoshop is something I use regularly, a web browser (no huge preference) is something I always need... but nothing 'killer' springs to mind.
Amarok for being such a wonderful, beautiful and powerful audio player. When I switched to Linux three years ago all I knew was Winamp, from back to versions 2.x (2.9x especially), then 5.x, so it took a while to get used to Amarok and change my habits (I also used XMMS when I started with Linux, but that didn't last long).
The other application I can think about is Basket, a KDE notes-taking application which allows to create full projects, not just simple notes. I also like KTorrent and SMPlayer, but the latter is available on Windows too.
I love CLI tools too, although these ones are available on Windows too (I think): flac, vorbis-tools, and many, many others.
TuxArena - Ubuntu/Debian/Mint Tutorials | Linux Stuff
Intro Tutorials | UbuTricks
I play Wesnoth sometimes. And AssaultCube.
SlideRocket.com
Online, awesome presentation app. Written in Flash so requires a bit powerful/modern computer to run flawless.
The best in life is free
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