I would argue that the Voyager mission is the most successful planetary mission of all time. Even now, 40 years after Voyager 1 and 2 were launched, a lot of the data they returned is still of high interest. In some cases it is obvious why: After all these years Voyager 2 is still the only spacecraft that has visited Uranus and Neptune.

The Voyager Jupiter data is also still very interesting, even though other spacecraft have followed in Voyager's footsteps. This is because the Voyager data, from 1979, allows us to monitor the long-term behavior of Jupiter and Io, and also because the Galileo mission that followed the Voyagers and orbited Jupiter in 1995-2003 was only partially successful due to the failure of its high gain antenna. Cassini flew by Jupiter en route to Saturn in 2000, but came no closer to Jupiter than about 10 million kilometers. Recently the Juno spacecraft has been orbiting Jupiter, but its scientific goals are different from Voyager and Galileo and in many ways complementary to them.

Voyager's Saturn data is perhaps the least interesting data set (surpassed by data from the spectacularly successful and long-lived Cassini mission), but still of interest for monitoring long-term changes in Saturn's and Titan's atmospheres and for studying Saturn's magnetosphere.

So processing (and reprocessing) the Voyager imaging data is still highly rewarding. Amateur space image processors and citizen scientists have produced many spectacular images from the raw Voyager image data set. Below is a selection of Voyager images from all four planets the Voyagers flew by. I did not always select the most spectacular or beautiful images. Instead I selected images to show various features and examples of the Voyager imaging coverage.

Voyager 1 and 2 flew by Jupiter in 1979 in March and July, respectively, obtaining lots of images of Jupiter and its satellites. Thousands of global images were obtained during approach. Below is an example. This is one of the most spectacular global Voyager Jupiter images available since it shows a double satellite transit. This also happens to be the highest-resolution Voyager global mosaic that can be assembled that includes a satellite transit (and luckily it's a double transit).