(all of them open in new windows)
Sheldon Brown's web - lots and lots of technical info about bikes and bike parts.
VeloVision - a very inspirative magazine about practical cycling and bikes of all shapes and purposes. Issue 52 from December 2016 was probably the last one, but you can still get the older ones in both paper and digital form.
EHPVA - relatively new european HPV association. They publish e-magazine EuSupino once per year.
Radek's gallery of amazing homebrew electronic gadgets - lights, blinkers, audio systems and the like.
iFavorit - Ivo's web about Favorit and Eska bikes and various other vehicles. Czech only.
Jirka Hebeda is a tinkerer like me, but by several levels better. Czech only.
Coverage map of the endemic existence of recumbent bikes in Czech Republic and Slovakia.
Carbusters - almost the same, just a little bit more radical.
Lehokolo.com - an internet magazine about recumbent bikes. Czech only, but there's not much to read and the photos are rather self-explanatory. Last update in 2012.
Yehuda Moon - a cycle-related webcomic.
Bikeyface - another cute webcomic.