Dragon City vs Neopets
Dragon City
Dragon City is a fun pet collection game where you play as a Dragon Master who is hellbent on taming and adding the wide variety of dragons to your collection. Of course, like most pet collecting games, you'll also get to breed them to get unique dragons with a combination of traits not commonly found in the wild. The dragons you own can also be trained and evolved into impressive and coller-looking versions - adult dragons that can be sent to fight other dragon masters from all around the world on your behalf.You'll even get to build a dragon city for all your dragons to live in. Spruce it up with some decor and watch as every visitor to your city's jaw drop in awe. Like DragonVale, the game is also quite social allowing you to not only visit each other, you can help them out and send them gifts too. Best yet, the game is a cross-platform game, meaning that you can save your progress via Facebook and play the game from either your browser or on your mobile device!
Neopets
Neopets is rather old yet entertaining simulation/virtual world game that lets you adopt and take care of magical and unique pets. This means that you'll be expected to build them a home, buy them food, clothes and other cool stuff. Set in a cartoonish and immense world, you can even set off on exciting adventures with your pet. Best part is that thepets in this game can grow alongside you and they have different looks for different stages of growth, much like the Pokemon in a Pokemon game. There are plenty of fun mini-games to keep you engaged for hours on end as well.
Although the game is a bit on the old side (being released in 1997 and all), the game still holds its charm for players who want a game that's a combination of a usual pet simulation/collection game with a virtual world game. It's free to play and you can play it directly from your browser!