KeyCastr is a small Mac app that shows keystrokes as you perform them. This is useful especially for screencasts when you need to know what was pressed. The only Windows app I could find that does something similar is osdHotKey.
Edit: KeyJedi has been made known to me through the comments. Thanks Hüseyin [...]

Setup your ActionMailer. I’m using Google Mail for my stuff: http://www.rubyinside.com/how-to-use-gmails-smtp-server-with-rails-394.html
ruby script/generate mailer testmailer
Add this code to testmailer.rb (Testmailer < ActionMailer::Base)
def test_mail(to)
subject “My first email!”
recipients “#{to}”
from ‘test’
charset “utf-8″
content_type ‘text/html’
body “Testing one two three…”
end

ruby script/console
Testmailer.deliver_test_mail(”you@yourdomain.com”)

ActionMailer API doc

Federal bank insurance fund dwindling - http://ap.google.com/article/ALeqM5i-pLQW20k50DG8EF0T3RFrFdH96wD9384DMO0
FDIC sees most problem banks since 2003 - http://news.yahoo.com/s/nm/20080827/bs_nm/banks_earnings_fdic_dc

This and it’s corresponding audio have some of the most enlightened commentary on the current US economic situation with regard to AIG and subprime mortgages. It’s about half an hour, but if you want to know what’s going on you should listen to it - it’s one of the shortest ways to learn.

Just set up a few google apps accounts using google mail and Thunderbird. There is a lot of misinformation on the web about what you should be using for settings in Thunderbird. If you want to set it up correctly and have everything function the way it should you really need to look [...]

glTail is a pretty neat little script (make sure you check out the video on the homepage.. static image doesn’t do it justice). It’s a ruby script that creates a visual representation of log files.
Install (if you have rubygems) is as easy as:
gem install gl_tail
It requires an older version of net-ssh that you can [...]