Every time an article like this comes up, snipMate seems to be mentioned. This particular author even pointed to the old repository which appears unmaintained and has not had a check-in for two years.

Where's the love for UltiSnips? [1]

UltiSnips is actively maintained and well documented, not to mention supporting many more features, such as Python interpolation. More info at [2].

[1] https://github.com/SirVer/ultisnips

[2] http://fueledbylemons.com/blog/2011/07/27/why-ultisnips/