AppTimer is described as 'will run an executable a number of times and time how long it takes for the application to reach a state where user input is being accepted before exiting the application'. There are six alternatives to AppTimer for Windows, Linux, Mac, BSD and Solaris. The best alternative is VisualVM, which is both free and Open Source. Other great apps like AppTimer are Eclipse Memory Analyzer (Free, Open Source), JConsole (Free, Open Source), YourKit Java Profiler (Paid) and YourKit .NET Profiler (Paid).
VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling capabilities. Designed for both production and development time use, it further enhances the capability of monitoring and performance analysis.
The Eclipse Memory Analyzer is a fast and feature-rich Java heap analyzer that helps you find memory leaks and reduce memory consumption. Use the Memory Analyzer to analyze productive heap dumps with hundreds of millions of objects.