We had a lot of luck sourcing candidates at career fairs from local universities, actually. They usually will head to the campus career center prior to contacting recruiting companies, but you can get hundreds of candidates (including double-digit good ones) for less than $500-1000. The signal-to-noise ratio we saw was also much, much better than you normally get from online services.
This doesn't scale well for middleware like the parent product, but it's a decent option for companies who are trying to attract talent.
This doesn't scale well for middleware like the parent product, but it's a decent option for companies who are trying to attract talent.