Do people have a right to access the Internet? Because that right, if it exists, is not enshrined in the first amendment.
Many argue it should be a right; how effective can you be in this modern world without access to the wealth of information the Internet puts at your fingertips? If this is a right, does this mean the government has a responsibility to ensure access is available? There are plenty of northern communities where access is not available in Canada. There are many public access points in most larger Canadian cities, but these access points often close at 5:00pm, which makes them practically impossible to use for many people.
Do people have a right to publish software, and a right to mathematics? You'd think that, since software is just text written in an obscure language and mathematics are just ideas you ought to be able to express in English, freedom of speech should cover it. However in the US, it is illegal to publish software which would circumvent a digital lock, thanks to the DMCA. Some would argue the DMCA is unconstitutional in this regard, however the DMCA has been around for a long time. If this right were explicit, would that be the case?
There are also many places in software consumer rights where the US and Canada fail epically; if I buy a piece of software in Canada and it doesn't work, that's tough, I can't return it. Why is that? (Although perhaps the right to return software is a bit outside the scope of a constitution).