This site contains FLASH animated libraries of the phonetic sounds of Spanish and English. Available for each consonant and vowel is an animated articulatory diagram, a step-by-step description, and video-audio of the sound spoken in context.
This site has a very impressive grammar checker. It not only checks the accuracy of your grammar but also makes suggestions for possible improvements. It can really help to boost your confidence to use something like this before submitting papers etc. It also checks for plagiarism.
Screenr | Instant screencasts: Just click record. Screenr’s web-based screen recorder makes it a breeze to create and share your screencasts around the web. Just click the record button, capture your screen & voice, and share the link.