HashTab v2.0 Released...

[sowhat-x]

http://www.beeblebrox.org/hashtab/

..and now it supports a total of 10 different hash algorithms... 
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There are tons of hash checking tools out there of course,
but I find HashTab to be more than comfortable...
it's one of those lightweight apps that since are always available at your right-click,
you just get that much used in them,you can't remember how it was before...
Say for example,Bintext (from Robin Keir),
is one of the first tools I always add to the "Send To" context-menu...
also Vim's "Edit with" shell extension...how to say it...
when in front of other people's computers,I get the feeling something's missing...

Similar stuff/right-click 'hacks' you've got addicted in making use of,guys? 

[JohnC]

I have Winrar added to right click, apart from that I try to keep it as light as possible. It definitely saves time having programs you use often added though.

[sowhat-x]

...i'm actually a right-click junkie...way much more than most Windows users are...
to get the idea,one of the first things that I had seen in *nix systems,
and that had got me impressed was...Blackbox,lol...
since then,I've replaced Explorer's shell with a lightweight variant of Blackbox for win32,
called bbLean...everything accessible just by right-clicking on the desktop...never looked back...
http://bb4win.sourceforge.net/bblean/

Other stuff added to right-click besides Vim Bintext...well,this one...
http://ccollomb.free.fr/unlocker/