电子书阅读器 - Fast PDF Kit，精选ios编程学习源码，很好的参考资料。
E-book reader- Fast PDF Kit, select learning IOS programming source code, a good reference. (2013-12-11, Objective-C, 7741KB, 下载4次)
BLazerouter任意角度全自动布线器，介绍了Blazerouter入门，设置和布线设计
Any angle BLazerouter automatic routing, and introduce a Blazerouter entry, settings, and wiring design (2008-09-05, Objective-C, 3919KB, 下载8次)
数字PID 控制算法、PID 调节器参数的定。
标准PID 算法的改进
Digital PID control algorithm, PID regulator parameters set. Standard PID algorithm (2008-06-10, Objective-C, 378KB, 下载240次)