Note: I have ceased working on projects with the HM-10 and the CC2541. The difficulties of dealing with the IAR toolchain are too great. I now recommend ARM mbed solutions if you intend to pursue developing a BLE peripheral. I am leaving the resources I was able to gather online in case someone has use for them, but I cannot provide support.
Getting into low power Bluetooth peripheral prototyping can get expensive quickly. This project aims to chart out and the document the cheapest, easiest way to create a true, custom peripheral with its own profile. Head on over the wiki to read more.
A sub ten dollar CC2541 development board based on the HM-10 module. This board is a fork of Ladvien's excellent work with the module.
On-board application and profile examples.
Client application examples (iOS).