Basically this is a table with cherry picked software projects where anything that isn't in ASM, C, C++, or Java is lumped into "Other". I don't know why anyone would create this useless page. It's in a style that honestly suggests "pre-internet" where all your knowledge came from curated sources. Nobody needs to curate this list.
Speaking of C++ Applications: http://www.stroustrup.com/applications.html
Gmail is equivalent to MS Outlook, so I think it's fair to include both.
Facebook is in another category (can we put it with Webpress or something). It's more a webpage than an application, but the difference is not so big.
Maybe the big five has 85-90% of all code ever written?
There are "C programmers" who are really using "C++ in C style" and don't realise what C++ brought to the table. Some C++ features have now been included into C.