From v2.1.0 /blogs/inc/plugins/model/_plugins_admin.class.php:

Hook: AdminAfterPageFooter;
Description: no description provided

Hook: AdminDisplayEditorButton;
Description: no description provided

Hook: AdminDisplayToolbar;
Description: Display a toolbar on the edit screen(s)

Hook: AdminDisplayCommentFormFieldset;
Description: no description provided

Hook: AdminDisplayItemFormFieldset;
Description: no description provided

Hook: AdminEndHtmlHead;
Description: no description provided

Hook: AdminAfterMenuInit;
Description: no description provided

Hook: AdminTabAction;
Description: no description provided

Hook: AdminTabPayload;
Description: no description provided

Hook: AdminToolAction;
Description: no description provided

Hook: AdminToolPayload;
Description: no description provided

Hook: AdminBeforeItemEditCreate;
Description: This gets called before a new item gets created from the backoffice.

Hook: AdminBeforeItemEditUpdate;
Description: This gets called before an existing item gets updated from the backoffice.

Hook: AdminBeforeItemEditDelete;
Description: This gets called before an existing item gets deleted from the backoffice.

Hook: AdminBeginPayload;
Description: no description provided

Hook: CacheObjects;
Description: Cache data objects.

Hook: CachePageContent;
Description: Cache page content.

Hook: CacheIsCollectingContent;
Description: Gets asked for if we are generating cached content.

Hook: AfterCommentDelete;
Description: Gets called after a comment has been deleted from the database.

Hook: AfterCommentInsert;
Description: Gets called after a comment has been inserted into the database.

Hook: AfterCommentUpdate;
Description: Gets called after a comment has been updated in the database.

Hook: AfterItemDelete;
Description: no description provided

Hook: PrependItemInsertTransact;
Description: no description provided

Hook: AfterItemInsert;
Description: no description provided

Hook: PrependItemUpdateTransact;
Description: no description provided

Hook: AfterItemUpdate;
Description: no description provided

Hook: AppendItemPreviewTransact;
Description: no description provided

Hook: FilterItemContents;
Description: Filters the content of a post/item right after input.

Hook: UnfilterItemContents;
Description: Unfilters the content of a post/item right before editing.

Hook: RenderItemAsHtml;
Description: Renders content when generated as HTML.

Hook: RenderItemAsXml;
Description: Renders content when generated as XML.

Hook: RenderItemAsText;
Description: Renders content when generated as plain text.

Hook: DisplayItemAsHtml;
Description: Called on an item when it gets displayed as HTML.

Hook: DisplayItemAsXml;
Description: Called on an item when it gets displayed as XML.

Hook: DisplayItemAsText;
Description: Called on an item when it gets displayed as text.

Hook: FilterCommentAuthor;
Description: Filters the comment author.

Hook: FilterCommentAuthorUrl;
Description: Filters the URL of the comment author.

Hook: FilterCommentContent;
Description: Filters the content of a comment.

Hook: AfterUserDelete;
Description: no description provided

Hook: AfterUserInsert;
Description: no description provided

Hook: AfterUserUpdate;
Description: no description provided

Hook: FilterIpAddress;
Description: Called when displaying an IP address.

Hook: ItemApplyAsRenderer;
Description: Asks the plugin if it wants to apply as a renderer for an item.

Hook: ItemCanComment;
Description: Asks the plugin if an item can receive comments/feedback.

Hook: ItemSendPing;
Description: Send a ping to a service about new items.

Hook: ItemViewsIncreased;
Description: Called when the view counter of an item got increased.

Hook: SkinTag;
Description: no description provided

Hook: AppendHitLog;
Description: Called when a hit gets logged, but before it gets recorded.

Hook: DisplayCommentToolbar;
Description: Display a toolbar on the public feedback form

Hook: DisplayCommentFormButton;
Description: no description provided

Hook: DisplayCommentFormFieldset;
Description: no description provided

Hook: DisplayMessageFormButton;
Description: no description provided

Hook: DisplayMessageFormFieldset;
Description: no description provided

Hook: DisplayLoginFormFieldset;
Description: Called when displaying the "Login" form.

Hook: DisplayRegisterFormFieldset;
Description: Called when displaying the "Register" form.

Hook: DisplayValidateAccountFormFieldset;
Description: Called when displaying the "Validate account" form.

Hook: CommentFormSent;
Description: Called when a public comment form has been sent and gets received.

Hook: BeforeCommentFormInsert;
Description: Called before a comment gets recorded through the public comment form.

Hook: AfterCommentFormInsert;
Description: Called after a comment has been added through public form.

Hook: BeforeTrackbackInsert;
Description: Gets called before a trackback gets recorded.

Hook: AfterTrackbackInsert;
Description: Gets called after a trackback has been recorded.

Hook: LoginAttempt;
Description: Called when a user tries to login.

Hook: LoginAttemptNeedsRawPassword;
Description: A plugin has to return true here, if it needs a raw (un-hashed) password in LoginAttempt.

Hook: AlternateAuthentication;
Description: no description provided

Hook: MessageFormSent;
Description: Called when the "Message to user" form has been submitted.

Hook: MessageFormSentCleanup;
Description: Called after a email message has been sent through public form.

Hook: Logout;
Description: Called when a user logs out.

Hook: GetSpamKarmaForComment;
Description: Asks plugin for the spam karma of a comment/trackback.

Hook: CaptchaValidated;
Description: Validate the test from CaptchaPayload to detect humans.

Hook: CaptchaValidatedCleanup;
Description: Cleanup data used for CaptchaValidated.

Hook: CaptchaPayload;
Description: Provide a turing test to detect humans.

Hook: RegisterFormSent;
Description: Called when the "Register" form has been submitted.

Hook: ValidateAccountFormSent;
Description: Called when the "Validate account" form has been submitted.

Hook: AppendUserRegistrTransact;
Description: Gets appended to the transaction that creates a new user on registration.

Hook: AfterUserRegistration;
Description: Gets called after a new user has registered.

Hook: SessionLoaded;
Description: no description provided

Hook: AfterLoginAnonymousUser;
Description: Gets called at the end of the login procedure for anonymous visitors.

Hook: AfterLoginRegisteredUser;
Description: Gets called at the end of the login procedure for registered users.

Hook: BeforeBlogDisplay;
Description: Gets called before a (part of the blog) gets displayed.

Hook: SkinBeginHtmlHead;
Description: Gets called at the top of the HTML HEAD section in a skin.

Hook: SkinEndHtmlBody;
Description: Gets called at the end of the skin's HTML BODY section.

Hook: DisplayTrackbackAddr;
Description: no description provided

Hook: GetCronJobs;
Description: Gets a list of implemented cron jobs.

Hook: GetProvidedSkins;
Description: Get a list of "skins" handled by the plugin.

Hook: PluginUserSettingsEditAction;
Description: Called as action before editing a user's settings.

I pulled it from the file and formatted it nicely for this forum. I made visiglyphs work in 210. Very easy to do. But since people wanted to use email or name instead of IP I wanted to add that. Not so hard to do, and done. But since I wanted to make it a plugin I figured I needed to know all the hooks available, so I did what I did last time and found the motherload of plugin hook information. It's not hidden or anything. It's just a cool place to go when you are thinking about hooks you might want to use. Now I can reference this post instead of having to actually open a file. Opening a file is hard. Caucusing is easy. Opening a file is hard.