Have you ever wanted to build sophisticated logic ICs -- not microprocessors, but real digital logic? Sure, microprocessors let you perform lots of sophisticated logic functions in software, but sometimes there is no substitute for real hardware.
http://tutor.al-williams.com/pldx-1.htm
Applications of the most common IC timer chip.
http://www.ee.ed.ac.uk/~kap/Hard/555/aplications.html
Search TI web pages for discrete, DSP, IC chip application notes and data sheets.
http://www.ti.com/pub/docs/sitemap.htm
An extensive list of all of Fairchild's Application notes.
http://www.fairchildsemi.com/apnotes/an_byfam_d5.html
An extensive list of some obscure data sheets and Application notes.
http://www.ife.tugraz.at/datashts/
Quite a few diagrams and pinouts on the CD4000 series of chips.
http://samengstrom.com/elec/cmos/index.html
A fairly extensive list of RF related application notes.
http://sss-mag.com/pdf.html
From Maxim, mostly RF.
http://dbserv.maxim-ic.com/an_prodline2.cfm?prodline=Wireless%2FRF