Yes you could play it without downloading it.
Pokemonindigo
nowear
just google free checkers game online
You can read it in OneManga.com for free without any downloading.
google " watch movies online for free"
ctv.ca
Hulu has the episodes.
U cant
Tax Act allows you to download tax software to your computer for free. However, if you do not wish to do that, you could also complete it online for free without downloading.
you can not
putlocker but sometimes it doesnt work
"Without downloading" that would require servers, nobody has done that yet, sorry.