Here is some essentials online tools that deserves to be known:
1 Minify your php script with
minifyPHP
2 Minify your javascripts with
jscssminifier
3 Un-minify your javascripts with
jsbeautifier
4 Compare two files online with
diffnow
5 A web interface to connect to your ftp server:
net2ftp
6 Take a snapshot of a website with different browsers and screen sizes with
browsershots
7 Create a favicon online from an image with
this service from chami.com
8 Crack your pdf online with
pdfcrack
9 Decode a barcode by uploading an image to
onlinebarcodereader
10 Download every online video with
keepvid
11 Create an animated GIF with
GifMaker
12 Create a custom map from OSM datas with
Maposmatic