Objective-C categories. Lots of helper methods I've accumulated over time, in one convenient place so I can include them in multiple projects.
Categories, categories everywhere!
Use Cocoapods. To install it, simply add the following line to your Podfile:
pod "PlusPlus"
If your project can't find the PlusPlus headers, this guide should help you fix it.
Available under the MIT license. See the LICENSE file for more info.