A note for links:
No link moratoriums are in effect. However, using http://archive.today/ will save the website in a "snapshot" and will prevent the unintended effect of running up a webmaster's bandwidth bill, as well as allowing users to view the website even if it goes down. Direct links to pictures on *booru sites will not function correctly and will likely be removed if it doesn't work. Upload pictures to an image host instead.
Touhou Project is a expansive series including vertical shooters (similar to Nintendo's 1942) and fighting games (like Street Fighter). The series has evolved over time, and it includes games made for the NEC-PC98, older Windows, and newer (post-XP) Windows. Touhou 1-5 are made for the NEC-PC98, Touhou 6-9.5 are made for older Windows (generally XP and before) and occasionally have compatibility issues with Windows 8+, and Touhou 10 and above are made for modern Windows versions. Linux and Mac users should use WINE to run Touhou.
A note on fan-made things:
A majority of Touhou content isn't necessarily from the creator, ZUN (all caps), but from works that the fans have dedicated their time towards. The amount of secondary content is truly extraordinary, and is most prevalent in the forms of games, flash animations, artwork, and music.
/!\ General Advisory Notice /!\
Before you upload a song to a video/music sharing site, check this list to ensure your upload won't get DMCA'd. Additionally, do not use risqué images (if using a *booru ensure the rating is "safe" and use common sense) on the videos, or else you can incur channel strikes as well.