People are not aware about various web tools available on the Internet. Recently I came across following such tools/sites, which will be useful for others and hence sharing with you. It will give idea and even motivation to others to do something new. Few resources given below are such lists and some sources gives the idea about how to use such web tools.
1. Directory of Experimental Library Tools: Blog written by Ken Varnum.
2. Illinois Library Web 2.0: The Blog
3. GO2WEB20 - Web Applications Index
5. Web and Library Tools from SLA
Before using these web tools do please check their utility, functionality and also their pricing..