How to store VBA Macros for Office 2007 to have them always available and share them with others?

With all due respect, Luiz is mistaken. You do not need Visual Studio to create add-ins, though you can certainly USE it for this.

In PowerPoint, you write VBA code and save it in a PPT or PPTM file, depending on your PowerPoint version. The code can use the old CommandBars object model to create command bars and buttons (which appear on an Add-ins tab in 2007/2010/2015).

You can then save as a PowerPoint Add-in (PPA or PPAM again depending on version and compatibility needs). The end user can install the add-in as they would any other, or you can create an installer or push the necessary registry settings out via group policy or whatever to multiple users. Installing an add-in via the registry involves only two or three settings.

Once installed, the add-in's toolbars/functionality would be available in the app and to any file open within it, not restricted to any particular document file.

Updates? Copy a new PPA/PPAM file to replace whatever one's already in place. The only restriction is that PowerPoint can't be running when you do that.

And back to due respect for Luiz ... he's correct, a third-party tool would be necessary to do version control. That or what a lot of us do if highly granular control isn't necessary; before making any changes, save the source file to a new file; each file's name includes the date it was created. It's also useful to include a constant that's set to the same date. An "About" command in the add-in can then display version or date or whatever you like so you can verify that the user has the correct version.

I have more detailed information about this on my Powerpoint FAQ site:

Creating and Installing Add-ins, Toolbars, Buttons http://www.pptfaq.com/index.html#name_Creating_and_Installing_Add-ins-_Toolbars-_Buttons

For Excel, your macros should be stored in the Personal Macro Workbook (PERSONAL.XLSB), which is by default hidden. Word has a Normal template which (IIRC) can store macros. Outlook has a similar thing, but I can't remember what it's called. PowerPoint is the anomaly and as far as I remember doesn't seem to have a place to store global macros.

I use SyncBackSE to sync my Excel macro workbook between computers. I don't update Outlook macros frequently enough to need a way of syncing them, but you could probably do something similar. Syncing can only be done when Excel is closed, as it locks the workbook. I don't know how you'd implement version control.