What are some alternatives?
When comparing Crinkler and Free UPX, you can also consider the following products
UPX - UPX (Ultimate Packer for eXecutables) achieves an excellent compression ratio and offers very fast...
Themida - Advanced Windows software protection system, developed for software developers who wish to protect...
ExEinfo PE - Packer, compressor detector / unpack info / internal exe tools.
Alienyze - Alienyze is a software packer and protection solution for windows executable files. Alienyze allows developers to easily protect their software against cracking and reverse engineering.
VMProtect - VMProtect Ultimate - All-In-One Solution For Software Licensing And Protection.
kkrunchy - kkrunchy is a small exe packer primarily meant for 64k intros.