session library: https://github.com/bpowers/seshcookie postgres library: https://github.com/bmizerany/pq man page generation: http://code.google.com/p/mango-doc/ crude xlsx library: https://github.com/tealeg/xlsx kicad libraries: http://www.kicadlib.org/ http://per.launay.free.fr/kicad/kicad_php/composant.php BOM commentary: http://blog.screamingcircuits.com/2012/01/is-your-bom-a-smart-bom.html IPC Standards: http://webstds.ipc.org/2581/2581intro.htm http://landpatterns.ipc.org/default.asp Data Formats: http://pcdandf.com/cms/designnews/8107-a-short-history-of-electronic-data-formats http://ljh4timm.home.xs4all.nl/pcb-fpw/pcb-fpw.html http://cyclerecorder.org/footprintbuilder/ "Upverter Universal Format Converter" https://github.com/upverter/schematic-file-converter