+* Citizen Scientists (contribute to science by playing games)
+ * [[http://fold.it/portal/|http://fold.it/portal/]]
+ * [[http://www.ancientlives.org|http://www.ancientlives.org]]
+ * [[http://www.planethunters.org/|http://www.planethunters.org/]]
+ * [[https://www.zooniverse.org/|https://www.zooniverse.org/]]
+ * ...
+* GNU/Linux Architecture
+ * [[http://en.wikipedia.org/wiki/Linux_architecture|http://en.wikipedia.org/wiki/Linux_architecture]]
+ * [[http://wiki.maemo.org/Documentation/Maemo_5_Developer_Guide/Architecture/Top_Level_Architecture|http://wiki.maemo.org/Documentation/Maemo_5_Developer_Guide/Architecture/Top_Level_Architecture]]
+* PDF tools
+ * [[http://packages.debian.org/unstable/main/bookletimposer|http://packages.debian.org/unstable/main/bookletimposer]]
+ * [[http://packages.debian.org/unstable/main/comparepdf|http://packages.debian.org/unstable/main/comparepdf]]
+ * [[http://packages.debian.org/unstable/main/diffpdf|http://packages.debian.org/unstable/main/diffpdf]]