My personal KiCad footprint collection. These are based on datasheets, random websites, personal experience and anything else I could get my hands on.
Some components (chip resistors, caps, etc) are available with a suffix A, B or C. A meaning "Why don't you take the next bigger part?", B being the one I tend to use most and C stands for "If I could just squeeze that last part in there...".
These suffixes didn't just drop from the sky, some more info can be found here: http://blogs.mentor.com/tom-hausherr/blog/2011/01/28/pcb-design-perfection-starts-in-the-cad-library-part-12/
Other components (mainly QFN packages) have some specific hacks and work-arounds. An example is the use of through hole pads for thermal vias. Another is the use of pads specifically for stencils.
For more info check out my site at: https://prjct.net
Feel free to contact me if you have suggestions, questions, improvements or other comments.
Copyright 2014, Stefan Hamminga.
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