Some Important Online Web services and WEPAPI you can Test and Use

Here are some free web services which you can consume and test your functionality

1. CurrencyConvertor
2. Business and Commerce
3. Communications 
4. Standards and Look up Data
5. Other Web Services
   

Some free web APIs

Yelp
Twitter
Flickr
Foursquare
Instagram
LinkedIn
Vimeo
Tumblr
Google Books
Facebook
Google+
YouTube
Rotten Tomatoes
New York Times
A long list of REST APIs: http://www.programmableweb.com/apis/directory/1?protocol=REST
- See more at: http://schoolofdata.org/2013/11/18/web-apis-for-non-programmers/#sthash.0A3bv9tu.dpuf

Free Online Software Language Source converters

1. Convert VB.NET to C# - A free code conversion tool 
2. CodeTranslator: Code Translation From VB.NET <-> C#