For changing images sequences such as resizing:
Photoshop can batch convert.
Freeware for non commercial use:
Fastsone Image Viewer
XNView
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For converting images sequences to an AVI file:
Free but displays a banner at the 1st second. Buy and get rid of the banner.
VideoMach
If anyone knows of a better image to AVI freeware please let us know.
Batch image converting software
Moderators: Víctor Paredes, Belgarath, slowtiger
A good freeware option for converting a sequence of images to an AVI file is VirtualDub. VD will read in a sequential series of images - you just select the first file in the sequence (under File>Open Video File) and it will load the rest of the sequence in order. Then set FPS and apply any filters/compression etc you want before exporting to avi... 

FFmpeg for video conversion and ImageMagick for images are excellent open source free tools for just about any conversion you'd like.
Both are command line tools which makes them very fast, usable and scriptable but there are various GUI frontends for them if you prefer that.
Both are command line tools which makes them very fast, usable and scriptable but there are various GUI frontends for them if you prefer that.