This program, made by Charles Strawbridge aka mrchay, allows you to take an html5 project and convert it to an Android .apk very simply.
Project page = https://bitbucket.org/mrchay/html5apkbuilder
In short : you need the Java Run time (JRE) but apparently not the Dev. Kit (JDK) installed.
You then copy your html5 project to the html5 folder and run the go.bat file.
In about a minute, the console window closes, and you have a signed apk in the same folder at the go.bat file.
The key used is a generic one but you can create your own (Google how) and place it in the key folder.
The download from the project page above includes 7z.exe and 7z.dll in the tools folder.
It appears that these are for 64 bit Windows OSes.
I replaced both of these files from my 32 bit install of 7-zip and it worked fine on my WinXP 32 bit OS.