Nikki and the Robots!

Braid is a platforming game in a painterly style where you manipulate the flow of time to solve puzzles.

Super Meat Boy is a platform game developed by Team Meat and is the successor to Edmund McMillen's and Jonathan McEntee's flash game, Meat Boy, originally released on the Newgrounds website in October 2008.

Cave Story, or Doukutsu Monogatari, is a Japanese freeware PC side-scrolling platformer game developed by Studio Pixel . It has been translated into English by Aeon Genesis Translations

Secret Maryo Chronicles is an Open Source two-dimensional platform game and is using an Open Graphics Library for the best possible graphic design and stock performance.

[Frogatto & Friends is free and open source on Windows and Linux, on the other platforms it costs $4.99].

The Iconoclasts is a graphically beautiful platform game with well written dialogue and flourishes with character.

Capsized is a retro-inspired 2d platformer developed by Alientrap. Presented in a unique hand drawn art style. As a intrepid space traveler, you have crash landed on a mysterious planet and soon discover you are not alone.

Welcome to the Minilens experiment.

Sonic The Hedgehog brings SEGA's legendary platformer mascot to modern systems with all the familiar 16-bit sights, sounds and blistering gameplay of the original.

A fan-made game based on the Castlevania series. Play as Efrain Lecarde, a knight of the church, who is sent to investigate a strange event that occurred in the cemetery of his hometown of Segovia Spain.

"Of Light & Shadow" is an award winning sidescroll puzzle-platformer for PC/Mac with a slight twist; the game combines two areas in each level, light and shadow, as well as two protagonists in one playable character, Mr. Light and Dr. Shadow. While either can only survive in light or shadow areas respectively, the player has to constantly switch between them and make the right decision about whose abilities to utilise. The game starts off with two introductory levels for each protagonist. While Mr. Light should feel like your typical platformer character, Dr. Shadow is more of a cognitive challenge with puzzles and, since being an unhurried academic, timing. After these separate tutorials, for the rest of the game the player can switch between the two complementary characters at any time to pass through levels full of moving platforms, tricky puzzles and many hazards that insistently try to harm you. »

Descend into the DarkVenture down into a beautiful, ruined world of insects and heroes

Toad Strikes Back is fan game based on classic Super Mario Bros. titles. It stars Toad from the Mario series.

In Knytt Stories, each level is its own little adventure. One level is included with the game, where you have to stop a machine that draws the life out of the planet. To find more levels to play, download the expansion pack or go to http://knyttlevels.com/ to find some made by the community.