One of the great strengths of the WordPress universe is its plethora of plugins (say that 10x fast). But every now and then you’ll find you need WordPress to do something that no plugin can do. This might be interfacing with one of your legacy systems, or performing a very customized calculation, or even just doing something an existing plugin does, but slightly differently.
Oftentimes, there are alternatives that may be easier and/or cheaper than going the custom plugin route. Crunch42 has built several custom WordPress plugins for specialized needs, and is happy to discuss your needs with you.