Gwendolyn is freeware; you can download it for free and use it as long as you like. Please note the license terms, however.
Requirements: The program runs on the following versions of Microsoft Windows and needs a PC with the following nowadays rather modest specification to run acceptably:
Installation: Just download and execute the following small 4 MB setup exe. The program has full uninstall support - if you don't like it, just uninstall it. The program is free of adware, spyware or other problematic parts as well.
Download Gwendolyn Version 1.01 Setup by HTTP
4 MB setup program with uninstall support