SkyVector.com, a site that has long provided very high quality scans of VFR
sectionals, TACs, and Fly charts, has now added low-altitude en-route IFR
charts to its database! High-altitude charts will follow. This is a huge
effort by the site, since IFR charts are available only on paper from the FAA
and are updated very frequently (every 8 weeks).

Of course, these online scans should not be used for real-world navigation
(wink, wink), but SkyVector is very good at keeping all its scans absolutely
current.