UPX Graphical!

FileOptimizer is a lossless file size optimizer supporting AIR, APK, APNG APPX, BMP, CBZ, DOCX, DLL, EPUB, EXE, GIF, GZ, ICO, JAR, JPEG, MNG, MP3, MPP, PNG, PPTX, ODT, OGG, OGV, PDF, PUB, SCR, SWF, TIF, VSD, WEBP, XAP, XLSX, and ZIP file formats among others.

Free UPX is an advanced graphical interface for the UPX (Ultimate Packer for eXecutables). It offers easy access to all documented and undocumented UPX parameters without the need for command line usage.

Packer, compressor detector / unpack info / internal exe tools.

Advanced Windows software protection system, developed for software developers who wish to protect their applications against advanced reverse engineering and software cracking.

VMProtect Ultimate - All-In-One Solution For Software Licensing And Protection. VMProtect protects code by executing it on a virtual machine with non-standard architecture that makes it extremely difficult to analyze and crack the software. Besides that, VMProtect generates and verifies serial numbers, limits free upgrades and much more.

ASPack is an advanced Win32 executable file compressor, capable of reducing the file size of 32-bit Windows programs by as much as 70%.

kkrunchy is a small exe packer primarily meant for 64k intros. It's relatively useless for anything else actually, because the depacker was relatively slow in older releases (about 1-2MB per second on my machine) and is dog slow in the newest version (about 90-120k per second for typical data on my P4 2.4GHz). kkrunchy also doesn't try to pack DLLs and can't handle exports or TLS (thread local storage) - as said, it's meant for 64ks.

Crinkler is an executable file compressor (or rather, a compressing linker) for Windows specifically targeted towards executables with a size of just a few kilobytes. As of 2011, it is the most widely used tool for compressing 4k intros.

PECompact is an advanced Windows executable compressor for use by software developers and vendors. Executable packers compress executable modules (EXE, DLL, etc..) so that their physical size is considerably smaller. At runtime, compressed modules are rapidly decompressed and reconstructed in memory.

WWPack32 - Windows executable files compressor and protector. Compressed exe and dll files run exactly as before!. This program squeezes exe files and protects Win32 applications from cracking.