The best campaigns include set up to promote a new "miracle shirt", which claims to be able to help combat body odour, to help men appear more desirable to women.
However, if the user dwells on the site long enough, it is revealed that the product is actually a hoax and has been set up by Gillette.
The site cuts away to an image of the new Gillette range and displays the strapline 'An altogether more realistic way of impressing the ladies'.
As usual, automotive brands have been particularly active in releasing April Fool ads, with BMW, Infiniti and Ferrari all getting in on the act.
BMW has run a campaign in a number of national newspapers using the headline 'Show your true colours this election', which gives drivers the chance to personalise their car with different-coloured BMW badges, depending on their political view.
Meanwhile Infiniti, the Nissan-owned luxury car brand, revealed details of new technology that is aimed at reducing the dangers of driving when hungry.
The manufacturer claims it has developed a system called Gastronomi, which can detect signs of hunger through a series of in-car sensors.
When a driver is in need of food, a knife and fork symbol will appear on the dashboard, and a selection of nearby restaurants will be suggested, using the car's satellite navigation system.
Not to be outdone, a few advertising agencies have managed to create some innovative April Fool campaigns of their own.
Delaney Lund Knox Warren has released warning people of a virus that affects iPhone handsets.
The video shows the virus causing all applications to disappear from the home screen and fall out the bottom of the device.
Renegade Marketing has also released plans for an ad-funded airline, which aims to turn a profit by selling space on its planes and services to advertisers.
And finally, continuing on the airline theme, Ryanair has released a statement claiming that it will soon be installing food and drink vending machines on its aircraft.
The budget carrier claims that 225 of its aircrafts will feature the machines, which offer hot and cold drinks, sandwiches, snacks, ice-cream, condoms and smokeless cigarettes.
However, going by Ryanair's track record, it's still up for debate whether or not this initiative is indeed an April Fool's Day joke.