How to on the net: free applets and services that solve problems

The problems

1. You have a list of interesting sites and want to know periodically if they have been changed.
2. Check of validity of links in a document.
3. Annotate an image
4. Creation of a client side imagemap.
5. Graphing data
6. Prepare a slide show
7. Create a visual index of your page.
8. Create automatically random images (like in a screen saver)
9. Display statistics from server log
10. Manage list of information about people you know.
11. Include a simple text in a html (without having to change the HTML.
12. See what's happening on your server in this moment.
13. Create a site map or navigational bar.
14. Give status information for a long load.
15. Display a mathematical formula.
16. Draw geometrical shapes with the computer(like xfig).
17. Make a transparent gif.
18. Make an interlaced gif.
19. Decrease number of colors in an image.
20. Create an animated gif.
21. Add fancy gauges to your applet.
22. Add a scrolling image to your applet
23. telnet
24. Allow many people to draw on the same drawing surface.
25. Text editing on a remote computer with no telnet facility.
26. Convert units of measurement.
27. Clock
28. Calculator
29. Do a real time chart.
30. Interface a ODBC data base
31. Ask the same query to many search engines
32. Have more than 10 hits in answer to your query to AltaVista.
33. Show the map of a site built automatically from the home page. Do the same for a tree of document.
34. Test your Web server to measure its performance(and other servers for comparison).
35. Download a site or a tree of documents for offline viewing.
36. Transform a document in a series of links to Alta Vista (or other services) to check for errors.
37. Show where on earth the sun is now.
38. Choose the best colors for background,hyperlinks and text.
39. Check a background image and color of hyperlinks and text.
40. Check loading time for your page with suggestions about what to do to speed it up.
41. Check correctnes of HTML
42. Show animation files (for example avi,fli,etc)
43. Show image files different from gif and jpg
44. Show postscript files
45. Show pdf files
46. Save the image created from a applet as a Postscript file for printing.
47. Help browsing a set of images by creating a visual index with miniatures.
48. Combine togheter many images.
49. Draw a simple sketch by hand.
50. Look at Latex (dvi) documents.
51. Show the links between the documents found from Altavista in answer to your query.
52. Provide a search engine for your web site
53. Mail client for many persons.
54. Implement something similar in functionality to a local Usenet news.
55. Create a Internet weather map by plotting ping results from many sites.
56. Compress/uncompress files.
57. Calendar
58. Text communication between many persons(like talk,irc,webchat).
59. Create a random Web link
60. Create a logo (text in 3D with shade,etc)
61. Create a random text.
62. Create a random image
63. Order form processing without CGI bin.
64. Create a Web server.
65. Create a ftp server.
66. Read news without NNTPserver.
67. Slide show of interesting sites.
68. Implements a Notice Board(what happens today?)
69. Decode mail with mime attachments.
70. Manage a full database.
71. finger without finger.
72. ping without ping
73. Implement a proxy server.
74. Implement a local proxy to allow Java applets to access Internet.
75. Personalize Welcome in returning home page.