GemVelocity
A way to see gem velocity. Right now it's just aggregated totals.
So, not a number of downloads each day, but rather just the general timeline of total downloads.
Requirements
It draws graphs. So...you'll need imagemagick/rmagick. I'm sure you'll survive. Any problems with installation let me know and I'll try to help out.
Example
This spec below:
it "has a shortcut graph method #1" do
VCR.use_cassette('velocitator-rails-multiple-graph-shortcut-3') do
velocitator = Velocitator.new("rails", ["4.0.0","3.2.14","2.3.5"])
file = velocitator.graph("/tmp")
File.exist?(file).should be_true
end
end
Produces:

This spec below (notice the date range):
it "has a shortcut graph method #2" do
VCR.use_cassette('velocitator-rails-multiple-graph-shortcut-4') do
velocitator = Velocitator.new("rails", ["4.0.0","3.2.14","0.9.1"])
file = velocitator.graph("/tmp", [3.months.ago, Time.now])
File.exist?(file).should be_true
end
end
Produces:

Also, you should be able to pass in max,min values which completes you being able to manipulate the boundries of the graph in question.
Web UI
Do you want to see this with ease (Hey, the api is easy. Whatever) on the web at http://rubygems-velocity.org/gem/rails/4.0.0,3.2.14 or something similar? I could do it, but I need to know it's worth the hassle.
Lemme know.
Feedback
Is appreciated! Any (other) ideas?