What are some alternatives?
When comparing Start Menu X and PortableApps.com, you can also consider the following products
Classic Shell - Classic Shell was developed for Windows 8 since that was the first version of the popular operating system to forgo the iconic Start menu.
LiberKey - Portable applications launcher, LiberKey includes 305 portable applications.
StartIsBack - StartIsBack returns Windows 10 and Windows 8 a real fully featured start menu and start button, behaving exactly like the ones in Windows 7. It's totally awesome and easy solution for your new Windows woes.
SyMenu - SyMenu is a portable menu launcher and Start Menu replacement to organize your applications quickly...
Start10 - Start10 adds the familiar Windows 7 start menu experience to Windows 10.
PStart - PStart is a simple tray tool to start user defined applications.