Touhou 1-5: PC-98 Touhou >6: Windows Spinoffs: Windows
You can download the games at various sites and forums, but I highly suggest you buy the game from a site like J-List. At Touhou Wikis you can find the English Patch for the games.
As for now, all the Touhou games (6 to 18) are only available for Windows computers and Mac (running bootcamp). Besides this, the games 1-5 are only available for download on PC-98 computers, which were dropped due to incompatibility. I'm honestly pretty unsure over how to download games 1-5, but you can find the official games on Steam, and can buy Touhou 6 on Amazon. (make sure to look for a trusted seller)
Internet.
Although pirating is pretty popular amongst the Touhou community, most games would fall under $14 CAD and the spin-offs being $12.
Touhou 1-5: PC-98 Touhou >6: Windows Spinoffs: Windows
It's listed by game on Touhou wiki, and we don't have enough memory to recall the endless amount of remixes. A complete list of all official Touhou songs can be found by visiting the related link.
You can download the games at various sites and forums, but I highly suggest you buy the game from a site like J-List. At Touhou Wikis you can find the English Patch for the games.
ZUN does not publicly share his direct contact information. Your best bet to reach him would be through his social media accounts or official website, if available. Alternatively, you can attend events where he might be present, such as Touhou Project music concerts or game conventions in Japan.
Touhou Hisōtensoku happened in 2009.
Touhou Hisōtensoku was created on 2009-08-15.
The Touhou Project was never cancelled. If it was, Japan would be in ruins.
internet.
At the moment nowhere. Touhou is only available officially in Japanese.
As for now, all the Touhou games (6 to 18) are only available for Windows computers and Mac (running bootcamp). Besides this, the games 1-5 are only available for download on PC-98 computers, which were dropped due to incompatibility. I'm honestly pretty unsure over how to download games 1-5, but you can find the official games on Steam, and can buy Touhou 6 on Amazon. (make sure to look for a trusted seller)
Internet.
09.09.09 was the official Cirno day. This is because of the Internet meme where she is the 9th object labelled in a Touhou game manual diagram as 'baka' (foolish). The Touhou series is well recognised around the globe. People will do anything for it.