The Developer Contest for Mashup Twilio with Twitter is an event where developers can combine cloud communications with Twitter to create innovative applications, with a focus on Chirp, the first official Twitter developer conference. The contest allows participants to submit their creative ideas and win a Netbook and $100 in Twilio developer credit. Previous winners of this category include GroupCall and Music Monday app, which showcased how developers can leverage Twitter's API to build useful applications such as group conferencing and music discovery platforms. The deadline for submissions is April 25th, and participants are encouraged to check out the resources provided by Twilio to help them create their application.