With Exe Guarder you can converter normal exe-file to shareware.
Once the executable is protected by exe guarder, you may copy it to another computer as it will stay protected. So you can publish it as shareware (also known as trialware or demoware), which give user a trial period for evaluation.
If you only want to add a password to a program, Exe Guarder is also the best choice because of its high security strength. Exe Guarder can also compress your exe file, the file size may be smaller or same as original.
And it support binding arguments. So with exe guarder you can protect most of the exe file, such as installer, flash exe, powerpoint exe, ebook and so on.

• Exe Guarder 5.1114
  Protects Exe-file with its own password from non-authorized execution or copy. Add a little more size (about 2k bytes); Custom the password-box notice; Keep the original file icon...

• Protect Exe 0.6
  Protect exe with high secure methode

• EXE Stealth Protector 3.16
  Protect your software against illegal use

• EXE Stealth Protector 4.19
  Protect your PDF, SWF, EXE and other data against illegal use with trial limits

• EXE Stealth Packer 3.11
  Protect and compress your software against illegal use

• Documents and Photos to EXE Protector 4.13
  Protect your software against illegal use

• Flash2X EXE Packager 3.0.1
  Flash2X EXE Packager is a program to covert flash to EXE files

• EXE Stealth 2.76
  Protect your EXE files