As a former subcontractor that was forced to use Deltek for a couple years, I will agree that it's the most popular... but I haven't the faintest notion of why. It wasn't the worst option available, but that didn't stop it from being terrible regardless.

Time-tracking keeps getting reinvented because no one's solved it definitively yet. I don't think anyone ever will, either; time tracking relies too much on individual context for it to be wholly standardized.

Given that there is no download link or price, I'm going to assume that 18F is not the kind of place that was going to pay top dollar for a cruddy, expensive third party service.

>>> Given that there is no download link or price

Like everything 18F produces, Tock is a work of the US Government and is in the public domain. There's a link to the GitHub repository in the blog post (https://github.com/18f/tock). We don't intend to launch Tock as a service, rather, it's something we made for internal use that is open for others if they find value in it.

I think he was referring to Deltek, not Tock.

Here's Deltek's GSA schedule (price list page 20 and on), though I don't know which product includes "Time & Expense".

https://www.gsaadvantage.gov/ref_text/GS35F0004P/0NIRVO.31QO...