PortableApps.com AppCompactor allows you to shrink down your apps to decrease their size as well as make them portable.

It is geared towards app developers but can also be used by regular users who wish to have more control over the size of the apps they use. PortableApps.com AppCompactor permits you to compress applications to decrease their size on the disk as well as increase performance when running from slow media like flash drives without affecting functionality.

PortableApps.com AppCompactor is displayed from a wizard-like layout, which will take a lot of guesswork out of using it with its step-by-step compression process. This tool does get some hits on VirusTotal, but they are false positives.

PortableApps.com AppCompactor Features:

Proven UPX binary compressor

7-Zip compression of archives

Multiple compression levels

Automatic testing of compressed files

Add inclusions/exclusions using PortableApps.com Format

Compression of DLL, EXE, ZIP, JAR, IRC, PYD and BINs in all directories

Automatically skip launcher if selecting PortableApps.com Format apps' base directory

Automatic exclusion of Visual C runtimes and Qt image handlers

Saving up to 50% or more installed space of many apps

Faster application starts from flash drives

The same technology we formerly used in OpenOffice.org Portable, Pidgin Portable, GIMP Portable, and others

Similar:

How to Open and Use a Cab File in Windows

Extract, Expand or Create CAB Files With the Command-Line

What Is a RAR File and How to Open Them

What is LZMA Compression?