XAMPP for Windows 8.1 is a web development tool which consists of essential softwares and tools such as Apache, MySQL, PHP, Perl, phpMyAdmin, etc. which make it easy to run a web server locally on your computer.
ownCloud is a popular open source cloud storage and data synchronization system which you can use to store your files and data such as photos, videos, music, documents, contacts, calendars, etc.
Google Drive is a cloud storage service from Google which lets you store your files and data such as photos, videos, music, documents, etc. and synchronize your Google Drive storage with your PC, smartphone, or tablet. Currently, Google Drive offers free storage upto 15 GB of data.