jZebra is a Java applet which allows you to print barcodes, receipts, and more from a Web page to your industry printer. It sends raw print commands and basic HTML and PDFs to your raw, PostScript, or LaserJet printer. It has been tested with Firefox, Safari, Internet Explorer, Chrome, and Opera. It supports parallel, serial, USB, and network printers.
If you can't reconnect to your WiFi until you reboot your Froyo device, Wifix (lite) will probably help you. Just click the "Reassign" button, and about 8 seconds later you will be reconnected to your WiFi. You can use "Reconnect" if it doesn't work for you. There is also a "Keep Connection" checkbox that prevents your WiFi connection from been deactivated.