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There are many great free deck building plans online. You can go to www.deckplans.com or www.decks.com to get these free plans.
There are many free building games online. If you like Lego, Brick building style games check out Roblox in the related links.
You can list a building online for free at real estate websites such as Zillow or Home Buyer. You can even list buildings for sale on websites such as Ebay.
A to Z mystery series
video.google.com i guess... there are just some...not all.
Free online games has many building games available at http://www.freeonlinegames.com/tag/building-games. Most of these games have some sort of construction and demolition aspect to them.
city cretor really fun online free just google it
There are sites online that give you access to free music such as imslp.
http://www.electrocity.co.nz/Game/
One can find a free construction calculator online at various websites. Some of these websites include Calculator Edge, Building-Cost, and Improvenet.
There are many free or cheap online designs. Most web building providers have a large range of templates from which you can choose. I don't have much web building experience but have always found templates to use.
One can download free eBooks from Amazon and iTunes and several are in the genre of mystery and thriller. Alternatively one could visit Mystery Net to read unpublished mystery stories. Also try: ManyBooks.net eBookLobby.com ReadAnyBook.com OpenLibrary.org Amazon.com GoogleBooks Project Gutenberg You will need to search for Mystery books.