Here you'll learn how to do just about everything with PDF documents without buying Adobe Acrobat. You can edit PDF files, combine multiple files as one, add signature images to PDF pages, fill PDF forms online, add clickable hyperlinks to existing PDF documents and so much more.

Edubuntu is an educational operating system that is a part of the Ubuntu family. It aims to make Ubuntu, the popular Linux-based operating system, a great choice for the computing needs of children, students, parents, teachers, and schools.

"These would be very helpful for you to create professional looking diagrams, such as flowcharts, sitemaps, organisation charts, wireframes, and many more. If you are designer, developer, office worker, manager, supervisor, student, home user, etc but we hope that these are worth checking for all of you"

"A TextArc is a visual represention of a text-the entire text (twice!) on a single page. A funny combination of an index, concordance, and summary; it uses the viewer's eye to help uncover meaning."

A great list of tutorial about Geogebra, sketchpad and general maths

Screenpresso is a new tool dedicated to screen capture with features that help users share screenshots on email and Twitter easily. It also provides a new way of capturing the screen using a single hot key, an history and a built-in editor like SnagIt for free.

One archive utility to rule them all. You no longer need a separate program for ZIP, RAR, ACE, 7-ZIP, TAR files and so on, IZArc can handle ALL of them. Basically this unpacker/archiver gives you everything you get with other popular archivers (ex. Winzip, Winrar etc.) but with additional features and support for a huge number of archive formats. It can decompress archived folders in over 40 formats. It supports pretty much every format you're likely to come across. There is something else, you can also use the IZArc utility to open CD image files like ISO, BIN, CDI and NRG. Do you know of any other free archiver that can do that? Note: When installing IZArc make sure to uncheck the "recommended" option to install PalTalk.

"With the Sessions.edu Color Calculator, you can identify color harmonies faster than with any color wheel or chart. Use it to select a color scheme for a corporate identity or design project. Rotate shapes on the color wheel to identify harmonious color schemes. Adjust saturation and lightness. Save RGB, CMYK, or HTML color values, then send them to a colleague or client."

These tools are suitable for those who want to start simply and have fun, as well as those interested in creating high-end simulated learning environments. A mix of free, open source and commercial tools.

There are 40 scripts of slideshows, lightboxes and galleries you can use for effective presentations to display your images on a website

"Teachers have always spent their own money on classroom supplies. With costs rising each year how can teachers add technology and software to the classroom without going broke? One answer is Freeware and/or Open Source software."

"There is one in every school. There is one in every district. There is that one teacher, no matter what you do, no matter how much time you take, how slow you go, how much one-on-one time you spend with them, there is that one teacher who is not going to integrate technology into their classroom. They dig in their heals. They bury their heads in the sand. They shut the doors to their classroom, leaving technology (and perhaps ultimately quality learning) out in the cold."

Microsoft Office Labs offers an Office 2003/2007 add-in called Community Clips, http://officelabs.com/Pages/ConceptTests.aspx. Use Community Clips to record application tutorials in which you want the viewer to see what you are doing on your desktop. The file is saved as a standard Windows Media Video (*.wmv).

Sribbly is a nice note taking application that sits in your system tray and lets you quickly jot down notes, to-do lists, ideas and any other text-based information that you may want to remember later.

Just what I have been looking for